Healthcare provider profile · identity verified

Jamal Hammoud, M.D.

Allopathic & Osteopathic Physicians|Internal Medicine|Endocrinology, Diabetes & Metabolism · FLINT, MI · NPI 1639284672

Profile state: payments and partd Open Payments: 2025 Medicare Part D: 2024 Last identity check: 2026-08-10 Page data build: 2026-08-12

Verified facts

What the public records show

CMS Open Payments records show Jamal Hammoud, M.D. received $41,689.47 in general payments during 2025 across 201 reported records.

Lilly USA, LLC accounted for 79.4% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 33 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Jardiance, Korlym, Mounjaro, Ozempic, Rybelsus.

ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ARMOUR THYROID as an associated drug or biological on 50 records involving 11 distinct recipient NPIs. Public Medicare Part D data also shows 16 claims for Armour Thyroid by this doctor in 2024.

ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported SYNTHROID as an associated drug or biological on 10655 records involving 4881 distinct recipient NPIs. Public Medicare Part D data also shows 58 claims for Synthroid by this doctor in 2024.

Amgen Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported PROLIA as an associated drug or biological on 20867 records involving 11744 distinct recipient NPIs. Public Medicare Part D data also shows 60 claims for Prolia by this doctor in 2024.

Boehringer Ingelheim Pharmaceuticals, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported JARDIANCE as an associated drug or biological on 123636 records involving 49438 distinct recipient NPIs. Public Medicare Part D data also shows 621 claims for Jardiance by this doctor in 2024.

Corcept Therapeutics reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Korlym as an associated drug or biological on 56316 records involving 19205 distinct recipient NPIs. Public Medicare Part D data also shows 22 claims for Korlym by this doctor in 2024.

Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported JARDIANCE as an associated drug or biological on 47708 records involving 23833 distinct recipient NPIs. Public Medicare Part D data also shows 621 claims for Jardiance by this doctor in 2024.

Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported MOUNJARO as an associated drug or biological on 186719 records involving 66436 distinct recipient NPIs. Public Medicare Part D data also shows 490 claims for Mounjaro by this doctor in 2024.

Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TRULICITY as an associated drug or biological on 71 records involving 57 distinct recipient NPIs. Public Medicare Part D data also shows 886 claims for Trulicity by this doctor in 2024.

Novo Nordisk Inc reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 681 claims for Ozempic by this doctor in 2024.

Novo Nordisk Inc reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Rybelsus as an associated drug or biological on 161257 records involving 55409 distinct recipient NPIs. Public Medicare Part D data also shows 25 claims for Rybelsus by this doctor in 2024.

SANOFI-AVENTIS U.S. LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported LANTUS as an associated drug or biological on 12 records involving 11 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Lantus by this doctor in 2024.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$41,689.47

201 reported records · 27 companies

Separate record types

Research & Ownership

Research Payments (direct recipient): not present in the loaded data

Associated Research Funding (for example, named PI): not present in the loaded data

Ownership / Investment: not present in the loaded data

These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.

Who paid this doctor?

Companies in 2025 General Payments

Reported companyCanonical companyAmountShareRecordsYear
Lilly USA, LLC Unresolved — no canonical attribution shown $33,095.0479.4%452025
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $3,309.427.9%102025
Novo Nordisk Inc Unresolved — no canonical attribution shown $2,964.447.1%132025
Amgen Inc. Unresolved — no canonical attribution shown $416.501.0%302025
Corcept Therapeutics Unresolved — no canonical attribution shown $311.750.8%172025
BETA BIONICS, INC. Unresolved — no canonical attribution shown $273.350.7%182025
Xeris Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $223.140.5%142025
Abbott Laboratories Unresolved — no canonical attribution shown $170.250.4%102025
Dexcom, Inc. Unresolved — no canonical attribution shown $124.990.3%62025
Ascendis Pharma Endocrinology Inc Unresolved — no canonical attribution shown $98.420.2%52025
Madrigal Pharmaceuticals Unresolved — no canonical attribution shown $87.770.2%42025
ABBVIE INC. Unresolved — no canonical attribution shown $85.710.2%52025
RECORDATI_RARE_DISEASES_INC. Unresolved — no canonical attribution shown $85.110.2%32025
Radius Health, Inc. Unresolved — no canonical attribution shown $79.830.2%42025
Amneal Pharmaceuticals LLC Unresolved — no canonical attribution shown $60.270.1%32025
Teleflex LLC Unresolved — no canonical attribution shown $53.620.1%12025
Medtronic, Inc. Medtronic, Inc.
exact · evidence 2025-07-22
$36.650.1%22025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $35.710.1%22025
Neurocrine BioSciences, Inc. Unresolved — no canonical attribution shown $30.140.1%12025
Verity Pharmaceuticals Inc. Unresolved — no canonical attribution shown $27.880.1%12025
KYOWA KIRIN, INC. Unresolved — no canonical attribution shown $24.580.1%12025
Alvogen Inc Unresolved — no canonical attribution shown $17.400.0%12025
SANOFI-AVENTIS U.S. LLC Unresolved — no canonical attribution shown $16.940.0%12025
Tandem Diabetes Care, Inc. Unresolved — no canonical attribution shown $16.910.0%12025
EVOKE PHARMA, INC. Unresolved — no canonical attribution shown $15.060.0%12025
Azurity Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $14.730.0%12025
Acella Pharmaceuticals, LLC Unresolved — no canonical attribution shown $13.860.0%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$33,150.0027
Food and Beverage$2,940.86164
Travel and Lodging$2,808.618
Consulting Fee$2,790.002

A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.

Analysis 1 · Payment-linked products

Products named in Open Payments records

Reported productTypeReported companyRelated amount*RecordsYear
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $28,776.43 37 2025
Source payment records
JARDIANCE
Normalized: jardiance
Drug Boehringer Ingelheim Pharmaceuticals, Inc., Lilly USA, LLC $4,909.42 12 2025
Source payment records
Korlym
Normalized: korlym
Drug Corcept Therapeutics $311.75 17 2025
Source payment records
iLet Bionic Pancreas
Normalized: ilet bionic pancreas
Device BETA BIONICS, INC. $273.35 18 2025
Source payment records
iLet Insulin Infusion Kit Contact Detach
Normalized: ilet insulin infusion kit contact detach
Device BETA BIONICS, INC. $273.35 18 2025
Source payment records
iLet Insulin Infusion Kit Inset
Normalized: ilet insulin infusion kit inset
Device BETA BIONICS, INC. $273.35 18 2025
Source payment records
RECORLEV
Normalized: recorlev
Drug Xeris Pharmaceuticals, Inc. $183.42 12 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $174.44 11 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $174.44 11 2025
Source payment records
FREESTYLE LIBRE 3
Normalized: freestyle libre 3
Device Abbott Laboratories $170.25 10 2025
Source payment records
TEPEZZA
Normalized: tepezza
Biological Amgen Inc. $158.59 14 2025
Source payment records
EVENITY
Normalized: evenity
Biological Amgen Inc. $155.70 8 2025
Source payment records
Dexcom G6 Transmitter
Normalized: dexcom g6 transmitter
Medical Supply Dexcom, Inc. $124.99 6 2025
Source payment records
REPATHA
Normalized: repatha
Biological Amgen Inc. $102.21 8 2025
Source payment records
Yorvipath
Normalized: yorvipath
Drug Ascendis Pharma Endocrinology Inc $98.42 5 2025
Source payment records
REZDIFFRA
Normalized: rezdiffra
Drug Madrigal Pharmaceuticals $87.77 4 2025
Source payment records
ISTURISA
Normalized: isturisa
Drug RECORDATI_RARE_DISEASES_INC. $85.11 3 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $82.96 5 2025
Source payment records
Tymlos
Normalized: tymlos
Drug Radius Health, Inc. $79.83 4 2025
Source payment records
UNITHROID
Normalized: unithroid
Drug Amneal Pharmaceuticals LLC $60.27 3 2025
Source payment records
BARRIGEL
Normalized: barrigel
Device Teleflex LLC $53.62 1 2025
Source payment records
GVOKE HYPOPEN
Normalized: gvoke hypopen
Drug Xeris Pharmaceuticals, Inc. $39.72 2 2025
Source payment records
MINIMED 780G
Normalized: minimed 780g
Device Medtronic, Inc. $36.65 2 2025
Source payment records
AREXVY
Normalized: arexvy
Biological GlaxoSmithKline, LLC. $35.71 2 2025
Source payment records
CRENESSITY
Normalized: crenessity
Drug Neurocrine BioSciences, Inc. $30.14 1 2025
Source payment records
Tlando
Normalized: tlando
Drug Verity Pharmaceuticals Inc. $27.88 1 2025
Source payment records
CRYSVITA
Normalized: crysvita
Drug KYOWA KIRIN, INC. $24.58 1 2025
Source payment records
TERIPARATIDE
Normalized: teriparatide
Drug Alvogen Inc $17.40 1 2025
Source payment records
TZIELD
Normalized: tzield
Biological SANOFI-AVENTIS U.S. LLC $16.94 1 2025
Source payment records
t:slim X2 Insulin Pump with Control-IQ
Normalized: t slim x2 insulin pump with control iq
Device Tandem Diabetes Care, Inc. $16.91 1 2025
Source payment records
GIMOTI
Normalized: gimoti
Drug EVOKE PHARMA, INC. $15.06 1 2025
Source payment records
AZMIRO
Normalized: azmiro
Drug Azurity Pharmaceuticals, Inc. $14.73 1 2025
Source payment records
NP Thyroid 60
Normalized: np thyroid 60
Drug Acella Pharmaceuticals, LLC $13.86 1 2025
Source payment records

* Product-associated amounts are non-additive because one payment record may name more than one product.

These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.

Public prescribing for products named in payments

Open Payments productPayment yearPart D brandPart D yearClaimsMatch methodSource
JARDIANCE
jardiance
2025 Jardiance 2024 621 exact normalized Medicare Part D
Korlym
korlym
2025 Korlym 2024 22
Beneficiary count suppressed
exact normalized Medicare Part D
MOUNJARO
mounjaro
2025 Mounjaro 2024 490 exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 681 exact normalized Medicare Part D
Rybelsus
rybelsus
2025 Rybelsus 2024 25
Beneficiary count suppressed
exact normalized Medicare Part D

The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.

Analysis 2 · Same-company prescribing overlap

Drugs reported in other payments from the same company that also appear in Medicare Part D

This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.

Paying companyPayment yearDrug reported by same entityOpen Payments evidencePart DClaimsBeneficiaries
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 ARMOUR THYROID
open payments reported associated product
CMS Open Payments — General Payments
50 supporting records · 11 recipient NPIs · example record 1201517088
Armour Thyroid · 2024
Exact normalized brand match · 1 Part D row
16 suppressed by CMS
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 SYNTHROID
open payments reported associated product
CMS Open Payments — General Payments
10655 supporting records · 4881 recipient NPIs · example record 1201352636
Synthroid · 2024
Exact normalized brand match · 1 Part D row
58 20
Amgen Inc.
Exact reporting entity; no affiliate inference
2025 PROLIA
open payments reported associated product
CMS Open Payments — General Payments
20867 supporting records · 11744 recipient NPIs · example record 1226874448
Prolia · 2024
Exact normalized brand match · 1 Part D row
60 37
Boehringer Ingelheim Pharmaceuticals, Inc.
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
123636 supporting records · 49438 recipient NPIs · example record 1221811583
Jardiance · 2024
Exact normalized brand match · 1 Part D row
621 187
Corcept Therapeutics
Exact reporting entity; no affiliate inference
2025 Korlym
open payments reported associated product
CMS Open Payments — General Payments
56316 supporting records · 19205 recipient NPIs · example record 1214133822
Korlym · 2024
Exact normalized brand match · 1 Part D row
22 suppressed by CMS
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
47708 supporting records · 23833 recipient NPIs · example record 1186464557
Jardiance · 2024
Exact normalized brand match · 1 Part D row
621 187
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 MOUNJARO
open payments reported associated product
CMS Open Payments — General Payments
186719 supporting records · 66436 recipient NPIs · example record 1186464455
Mounjaro · 2024
Exact normalized brand match · 1 Part D row
490 125
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 TRULICITY
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 57 recipient NPIs · example record 1186464601
Trulicity · 2024
Exact normalized brand match · 1 Part D row
886 231
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Ozempic
open payments reported associated product
CMS Open Payments — General Payments
261625 supporting records · 77793 recipient NPIs · example record 1188130076
Ozempic · 2024
Exact normalized brand match · 1 Part D row
681 192
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Rybelsus
open payments reported associated product
CMS Open Payments — General Payments
161257 supporting records · 55409 recipient NPIs · example record 1188130076
Rybelsus · 2024
Exact normalized brand match · 1 Part D row
25 suppressed by CMS
SANOFI-AVENTIS U.S. LLC
Exact reporting entity; no affiliate inference
2025 LANTUS
open payments reported associated product
CMS Open Payments — General Payments
12 supporting records · 11 recipient NPIs · example record 1233196856
Lantus · 2024
Exact normalized brand match · 1 Part D row
13 suppressed by CMS

These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.

Public Medicare Part D data

Provider-and-drug rows loaded for 2024

BrandGenericClaimsBeneficiaries
Levothyroxine SodiumLevothyroxine Sodium1234402
TrulicityDulaglutide886231
Lantus SolostarInsulin Glargine,hum.Rec.Anlog723277
OzempicSemaglutide681192
Metformin HclMetformin Hcl634219
JardianceEmpagliflozin621187
MounjaroTirzepatide490125
Humalog Kwikpen U-100Insulin Lispro357143
GlimepirideGlimepiride23992
Novolog FlexpenInsulin Aspart237108
Ultra-Fine Mini Pen NeedlePen Needle, Diabetic204101
Ultra-Fine Nano Pen NeedlePen Needle, Diabetic17087
Pioglitazone HclPioglitazone Hcl16340
JanuviaSitagliptin Phosphate15646
Nano 2nd Gen Pen NeedlePen Needle, Diabetic15299
Tresiba Flextouch U-200Insulin Degludec14048
Metformin Hcl ErMetformin Hcl13957
FarxigaDapagliflozin Propanediol12630
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog10436
MethimazoleMethimazole10043
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog8922
Droplet Pen NeedlePen Needle, Diabetic8744
Glipizide ErGlipizide8434
Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog8337
HumalogInsulin Lispro7627
GabapentinGabapentin7224
NovologInsulin Aspart7224
Atorvastatin CalciumAtorvastatin Calcium7129
Insulin Lispro Kwikpen U-100Insulin Lispro7136
Losartan PotassiumLosartan Potassium6323
Comfort Ez Pen NeedlePen Needle, Diabetic6129
ProliaDenosumab6037
Fiasp FlextouchInsulin Aspart (Niacinamide)5822
SynthroidLevothyroxine Sodium5820
Alcohol Prep PadsAlcohol Antiseptic Pads5716
Tresiba Flextouch U-100Insulin Degludec5620
CalcitriolCalcitriol5313
Levemir FlexpenInsulin Detemir5136
Alendronate SodiumAlendronate Sodium4817
GlipizideGlipizide4720
Amlodipine BesylateAmlodipine Besylate4516
Ultra-Fine Short Pen NeedlePen Needle, Diabetic4523
Cinacalcet HclCinacalcet Hcl41suppressed
Novolog Mix 70-30 FlexpenInsulin Aspart Prot/Insuln Asp3912
Testosterone CypionateTestosterone Cypionate3913
Omnipod 5 Dexg7g6 Pods (Gen 5)Insulin Pump Cart,auto,bt,g6/738suppressed
Easy Touch Pen NeedlePen Needle, Diabetic37suppressed
TradjentaLinagliptin3718
Janumet XrSitagliptin Phos/Metformin Hcl3512
Humulin R U-500Insulin Regular, Human33suppressed
HydrocortisoneHydrocortisone3315
Humulin R U-500 KwikpenInsulin Regular, Human30suppressed
OmeprazoleOmeprazole30suppressed
Fludrocortisone AcetateFludrocortisone Acetate29suppressed
InvokanaCanagliflozin2914
Humalog Mix 75-25 KwikpenInsulin Lispro Protamin/Lispro28suppressed
Admelog SolostarInsulin Lispro26suppressed
LisinoprilLisinopril25suppressed
RybelsusSemaglutide25suppressed
Tamsulosin HclTamsulosin Hcl24suppressed
Metoprolol SuccinateMetoprolol Succinate2311
PregabalinPregabalin23suppressed
Rosuvastatin CalciumRosuvastatin Calcium23suppressed
KorlymMifepristone22suppressed
Techlite Pen NeedlePen Needle, Diabetic22suppressed
SimvastatinSimvastatin20suppressed
SpironolactoneSpironolactone20suppressed
Pen NeedlePen Needle, Diabetic1914
PrednisonePrednisone19suppressed
TestosteroneTestosterone19suppressed
Ulticare Pen NeedlePen Needle, Diabetic19suppressed
Humalog Kwikpen U-200Insulin Lispro1813
Insulin SyringeSyringe-Needle,insulin,0.5 Ml18suppressed
Novolin 70-30Insulin Nph Hum/Reg Insulin Hm18suppressed
JanumetSitagliptin Phos/Metformin Hcl17suppressed
Metoprolol TartrateMetoprolol Tartrate17suppressed
Advocate Pen NeedlesPen Needle, Diabetic16suppressed
Armour ThyroidThyroid,pork16suppressed
Humulin RInsulin Regular, Human16suppressed
Trueplus Pen NeedlePen Needle, Diabetic16suppressed
EstradiolEstradiol15suppressed
Gvoke Hypopen 2-PackGlucagon1514
HydrochlorothiazideHydrochlorothiazide15suppressed
Insulin Aspart FlexpenInsulin Aspart1513
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide15suppressed
Potassium ChloridePotassium Chloride15suppressed
Sure Comfort Pen NeedlePen Needle, Diabetic15suppressed
Omnipod Dash Pods (Gen 4)Insulin Pump Cart,cont Inf,bt14suppressed
CarvedilolCarvedilol13suppressed
EzetimibeEzetimibe13suppressed
LantusInsulin Glargine,hum.Rec.Anlog13suppressed
AlprazolamAlprazolam12suppressed
Amiodarone HclAmiodarone Hcl12suppressed
GlyxambiEmpagliflozin/Linagliptin12suppressed
Np ThyroidThyroid,pork12suppressed
Synjardy XrEmpagliflozin/Metformin Hcl12suppressed
AtenololAtenolol11suppressed
BaclofenBaclofen11suppressed
CelecoxibCelecoxib11suppressed
FurosemideFurosemide11suppressed
Humulin 70/30 KwikpenInsulin Nph Hum/Reg Insulin Hm11suppressed

Timeline

Payment and prescribing data by year

Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.

YearGeneral PaymentsMain payerExplicit productsCompany overlapsPart D coverage
2025 $41,689.47 · 201 records Lilly USA, LLC AREXVY, AZMIRO, BARRIGEL, CRENESSITY, CRYSVITA, Dexcom G6 Transmitter, EVENITY, FREESTYLE LIBRE 3, GIMOTI, GVOKE HYPOPEN, ISTURISA, JARDIANCE, Korlym, MINIMED 780G, MOUNJARO, NP Thyroid 60, Ozempic, RECORLEV, REPATHA, REZDIFFRA, Rybelsus, TEPEZZA, TERIPARATIDE, TZIELD, Tlando, Tymlos, UNITHROID, Yorvipath, ZEPBOUND, iLet Bionic Pancreas, iLet Insulin Infusion Kit Contact Detach, iLet Insulin Infusion Kit Inset, t:slim X2 Insulin Pump with Control-IQ 11
2024 Complete

Questions to ask

Questions you could discuss with your doctor

These are general questions generated from reviewed templates. They are not personalized medical advice.

Sources and limitations

How to read this page

Loaded source releases

DatasetYearPublicationSource
CMS Open Payments — General Payments 2025 2026-06-30 Original source
Medicare Part D Prescribers by Provider and Drug 2024 2026-05-06 Original source
NPPES Data Dissemination V2 current / reference data 2026-08-10 Original source

Methodology version: 2.1

Editorial template version: 2.4

Product contract version: 2.0

Schema version: 0.7.0

Page data build: 2026-08-12T23:34:59.370714+00:00

Publication policy: eligible for indexing after public-launch controls are enabled

Full methodology · Questions & answers · Report a possible error