Payment overview · 2025
General Payments
$316.33
22 reported records · 2 companies
Healthcare provider profile · identity verified
Stephen Robert Beck, M.D.
Allopathic & Osteopathic Physicians|Internal Medicine · INDIANAPOLIS, IN · NPI 1174639249
Verified facts
What the public records show
CMS Open Payments records show Stephen Robert Beck, M.D. received $316.33 in general payments during 2025 across 22 reported records.
Amgen Inc. accounted for 56.0% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 5 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Eliquis, Nurtec Odt.
PFIZER 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 ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 179 claims for Eliquis by this doctor in 2024.
PFIZER 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 NURTEC ODT as an associated drug or biological on 217574 records involving 54025 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Nurtec Odt by this doctor in 2024.
PFIZER 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 PAXLOVID as an associated drug or biological on 24465 records involving 15715 distinct recipient NPIs. Public Medicare Part D data also shows 62 claims for Paxlovid by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
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 company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| Amgen Inc. | Unresolved — no canonical attribution shown | $177.07 | 56.0% | 14 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $139.26 | 44.0% | 8 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $316.33 | 22 |
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 product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| REPATHA Normalized: repatha |
Biological | Amgen Inc. | $177.07 | 14 | 2025 |
Source payment records
|
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| OTEZLA Normalized: otezla |
Drug | Amgen Inc. | $161.74 | 13 | 2025 |
Source payment records
|
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| NURTEC ODT Normalized: nurtec odt |
Drug | PFIZER INC. | $139.26 | 8 | 2025 |
Source payment records
|
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| ELIQUIS Normalized: eliquis |
Drug | PFIZER INC. | $114.74 | 5 | 2025 |
Source payment records
|
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| ZAVZPRET Normalized: zavzpret |
Drug | PFIZER INC. | $24.52 | 3 | 2025 |
Source payment records
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* 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 product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| ELIQUIS eliquis |
2025 | Eliquis | 2024 | 179 | exact normalized | Medicare Part D |
| NURTEC ODT nurtec odt |
2025 | Nurtec Odt | 2024 | 12 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 company | Payment year | Drug reported by same entity | Open Payments evidence | Part D | Claims | Beneficiaries |
|---|---|---|---|---|---|---|
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | ELIQUIS open payments reported associated product |
CMS Open Payments — General Payments 87112 supporting records · 36032 recipient NPIs · example record 1228794063 |
Eliquis · 2024 Exact normalized brand match · 1 Part D row |
179 | 42 |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | NURTEC ODT open payments reported associated product |
CMS Open Payments — General Payments 217574 supporting records · 54025 recipient NPIs · example record 1228794063 |
Nurtec Odt · 2024 Exact normalized brand match · 1 Part D row |
12 | suppressed by CMS |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | PAXLOVID open payments reported associated product |
CMS Open Payments — General Payments 24465 supporting records · 15715 recipient NPIs · example record 1228794432 |
Paxlovid · 2024 Exact normalized brand match · 1 Part D row |
62 | 62 |
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
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 708 | 189 |
| Amlodipine Besylate | Amlodipine Besylate | 557 | 145 |
| Levothyroxine Sodium | Levothyroxine Sodium | 532 | 147 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 395 | 111 |
| Gabapentin | Gabapentin | 351 | 90 |
| Pantoprazole Sodium | Pantoprazole Sodium | 347 | 106 |
| Prednisone | Prednisone | 300 | 136 |
| Azithromycin | Azithromycin | 297 | 182 |
| Tamsulosin Hcl | Tamsulosin Hcl | 291 | 78 |
| Tramadol Hcl | Tramadol Hcl | 282 | 73 |
| Metoprolol Succinate | Metoprolol Succinate | 270 | 77 |
| Alprazolam | Alprazolam | 268 | 61 |
| Omeprazole | Omeprazole | 233 | 62 |
| Methylprednisolone | Methylprednisolone | 222 | 142 |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 209 | 61 |
| Clopidogrel | Clopidogrel Bisulfate | 207 | 60 |
| Escitalopram Oxalate | Escitalopram Oxalate | 192 | 52 |
| Mounjaro | Tirzepatide | 191 | 30 |
| Allopurinol | Allopurinol | 188 | 53 |
| Zolpidem Tartrate | Zolpidem Tartrate | 188 | 26 |
| Valsartan | Valsartan | 187 | 52 |
| Hydrochlorothiazide | Hydrochlorothiazide | 185 | 46 |
| Xarelto | Rivaroxaban | 183 | 42 |
| Eliquis | Apixaban | 179 | 42 |
| Furosemide | Furosemide | 179 | 55 |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 176 | 101 |
| Irbesartan | Irbesartan | 174 | 46 |
| Meloxicam | Meloxicam | 163 | 40 |
| Lisinopril | Lisinopril | 162 | 47 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 155 | 48 |
| Trazodone Hcl | Trazodone Hcl | 155 | 42 |
| Repatha Sureclick | Evolocumab | 152 | 32 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 148 | 42 |
| Potassium Chloride | Potassium Chloride | 147 | 40 |
| Entresto | Sacubitril/Valsartan | 143 | 22 |
| Losartan Potassium | Losartan Potassium | 141 | 39 |
| Lorazepam | Lorazepam | 135 | 27 |
| Metformin Hcl | Metformin Hcl | 133 | 42 |
| Clonazepam | Clonazepam | 127 | 21 |
| Bupropion Xl | Bupropion Hcl | 124 | 33 |
| Ropinirole Hcl | Ropinirole Hcl | 121 | 24 |
| Spironolactone | Spironolactone | 111 | 32 |
| Ibuprofen | Ibuprofen | 104 | 24 |
| Atenolol | Atenolol | 103 | 23 |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 94 | 24 |
| Dextroamphetamine-Amphetamine | Dextroamphetamine/Amphetamine | 93 | 16 |
| Famotidine | Famotidine | 90 | 28 |
| Pioglitazone Hcl | Pioglitazone Hcl | 80 | 23 |
| Tizanidine Hcl | Tizanidine Hcl | 80 | 26 |
| Carvedilol | Carvedilol | 77 | 21 |
| Ipratropium Bromide | Ipratropium Bromide | 77 | 24 |
| Metoprolol Tartrate | Metoprolol Tartrate | 77 | 23 |
| Sertraline Hcl | Sertraline Hcl | 76 | 23 |
| Simvastatin | Simvastatin | 76 | 23 |
| Irbesartan-Hydrochlorothiazide | Irbesartan/Hydrochlorothiazide | 75 | 20 |
| Cephalexin | Cephalexin | 74 | 31 |
| Baclofen | Baclofen | 73 | 19 |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 73 | 16 |
| Temazepam | Temazepam | 71 | 12 |
| Valacyclovir | Valacyclovir Hcl | 70 | 30 |
| Estradiol | Estradiol | 69 | 20 |
| Synthroid | Levothyroxine Sodium | 68 | 20 |
| Duloxetine Hcl | Duloxetine Hcl | 67 | 19 |
| Glipizide | Glipizide | 65 | 22 |
| Acyclovir | Acyclovir | 63 | 13 |
| Finasteride | Finasteride | 63 | 16 |
| Fluoxetine Hcl | Fluoxetine Hcl | 63 | 16 |
| Paxlovid | Nirmatrelvir/Ritonavir | 62 | 62 |
| Memantine Hcl | Memantine Hcl | 60 | 15 |
| Mirtazapine | Mirtazapine | 60 | 12 |
| Quetiapine Fumarate | Quetiapine Fumarate | 60 | 13 |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 59 | 12 |
| Cefdinir | Cefdinir | 58 | 41 |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 58 | 15 |
| Amlodipine-Valsartan | Amlodipine Besylate/Valsartan | 56 | 15 |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 56 | 11 |
| Ozempic | Semaglutide | 56 | 11 |
| Pravastatin Sodium | Pravastatin Sodium | 56 | 17 |
| Pregabalin | Pregabalin | 56 | 13 |
| Celecoxib | Celecoxib | 55 | 13 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 54 | 31 |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 53 | 13 |
| Metronidazole | Metronidazole | 51 | 30 |
| Clonidine Hcl | Clonidine Hcl | 50 | 18 |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 50 | 11 |
| Diazepam | Diazepam | 50 | 13 |
| Testosterone Cypionate | Testosterone Cypionate | 50 | 11 |
| Klor-Con M20 | Potassium Chloride | 49 | 16 |
| Tresiba Flextouch U-200 | Insulin Degludec | 49 | suppressed |
| Ondansetron Hcl | Ondansetron Hcl | 48 | 18 |
| Amoxicillin | Amoxicillin | 47 | 25 |
| Citalopram Hbr | Citalopram Hydrobromide | 47 | 16 |
| Montelukast Sodium | Montelukast Sodium | 46 | 13 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 46 | 27 |
| Fluconazole | Fluconazole | 44 | 20 |
| Sodium Chloride | 0.9 % Sodium Chloride | 42 | suppressed |
| Aripiprazole | Aripiprazole | 41 | 16 |
| Doxycycline Hyclate | Doxycycline Hyclate | 40 | 22 |
| Hydrocortisone | Hydrocortisone | 40 | 15 |
| Jardiance | Empagliflozin | 39 | suppressed |
| Myrbetriq | Mirabegron | 38 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 37 | suppressed |
| Fluticasone Propionate | Fluticasone Propionate | 37 | 11 |
| Primidone | Primidone | 37 | suppressed |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 36 | suppressed |
| Diclofenac Sodium | Diclofenac Sodium | 36 | 13 |
| Ezetimibe | Ezetimibe | 36 | suppressed |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 36 | 14 |
| Tradjenta | Linagliptin | 36 | suppressed |
| Promethazine Hcl | Promethazine Hcl | 35 | 15 |
| Diphenoxylate-Atropine | Diphenoxylate Hcl/Atropine | 33 | 12 |
| Incruse Ellipta | Umeclidinium Bromide | 33 | suppressed |
| Nitrofurantoin | Nitrofurantoin Macrocrystal | 33 | suppressed |
| Alendronate Sodium | Alendronate Sodium | 32 | suppressed |
| Farxiga | Dapagliflozin Propanediol | 32 | suppressed |
| Digoxin | Digoxin | 31 | suppressed |
| Fenofibrate | Fenofibrate | 31 | suppressed |
| Fluocinonide | Fluocinonide | 31 | 24 |
| Hydroxychloroquine Sulfate | Hydroxychloroquine Sulfate | 31 | suppressed |
| Donepezil Hcl | Donepezil Hcl | 30 | suppressed |
| Gemfibrozil | Gemfibrozil | 30 | suppressed |
| Glyxambi | Empagliflozin/Linagliptin | 30 | suppressed |
| Risperidone | Risperidone | 30 | suppressed |
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 29 | suppressed |
| Ultra-Fine Mini Pen Needle | Pen Needle, Diabetic | 29 | 12 |
| Glipizide Er | Glipizide | 27 | suppressed |
| Ketorolac Tromethamine | Ketorolac Tromethamine | 27 | suppressed |
| Olanzapine | Olanzapine | 27 | suppressed |
| Olmesartan-Amlodipine-Hctz | Olmesartan/Amlodipin/Hcthiazid | 27 | suppressed |
| Toujeo Max Solostar | Insulin Glargine,hum.Rec.Anlog | 27 | suppressed |
| Chlorthalidone | Chlorthalidone | 26 | suppressed |
| Nitroglycerin | Nitroglycerin | 26 | suppressed |
| Creon | Lipase/Protease/Amylase | 25 | suppressed |
| Eplerenone | Eplerenone | 25 | suppressed |
| Meclizine Hcl | Meclizine Hcl | 25 | 12 |
| Nebivolol Hcl | Nebivolol Hcl | 25 | suppressed |
| Amiloride Hcl | Amiloride Hcl | 24 | suppressed |
| Buspirone Hcl | Buspirone Hcl | 24 | suppressed |
| Desvenlafaxine Succinate Er | Desvenlafaxine Succinate | 24 | suppressed |
| Lovastatin | Lovastatin | 24 | suppressed |
| Modafinil | Modafinil | 24 | suppressed |
| Propranolol Hcl Er | Propranolol Hcl | 24 | suppressed |
| Trulicity | Dulaglutide | 24 | suppressed |
| Ciclopirox | Ciclopirox Olamine | 23 | 13 |
| Eszopiclone | Eszopiclone | 23 | suppressed |
| Glycopyrrolate | Glycopyrrolate | 23 | suppressed |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 23 | 14 |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 23 | suppressed |
| Verquvo | Vericiguat | 23 | suppressed |
| Breo Ellipta | Fluticasone/Vilanterol | 22 | suppressed |
| Oxybutynin Chloride | Oxybutynin Chloride | 22 | suppressed |
| Tresiba Flextouch U-100 | Insulin Degludec | 22 | suppressed |
| Atomoxetine Hcl | Atomoxetine Hcl | 21 | suppressed |
| Potassium Citrate Er | Potassium Citrate | 21 | suppressed |
| Alfuzosin Hcl Er | Alfuzosin Hcl | 20 | suppressed |
| Cyanocobalamin Injection | Cyanocobalamin (Vitamin B-12) | 20 | suppressed |
| Dabigatran Etexilate | Dabigatran Etexilate Mesylate | 20 | suppressed |
| Doxazosin Mesylate | Doxazosin Mesylate | 20 | suppressed |
| Ondansetron Odt | Ondansetron | 20 | suppressed |
| Trintellix | Vortioxetine Hydrobromide | 20 | suppressed |
| Verapamil Er | Verapamil Hcl | 20 | suppressed |
| Gemtesa | Vibegron | 19 | suppressed |
| Metformin Hcl Er | Metformin Hcl | 19 | suppressed |
| Methylphenidate Hcl | Methylphenidate Hcl | 19 | suppressed |
| Oxcarbazepine | Oxcarbazepine | 19 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 19 | suppressed |
| Sucralfate | Sucralfate | 19 | suppressed |
| Symbicort | Budesonide/Formoterol Fumarate | 19 | suppressed |
| Varenicline Tartrate | Varenicline Tartrate | 19 | suppressed |
| Bisoprolol-Hydrochlorothiazide | Bisoprolol/Hydrochlorothiazide | 18 | suppressed |
| Paroxetine Hcl | Paroxetine Hcl | 18 | suppressed |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 18 | suppressed |
| Warfarin Sodium | Warfarin Sodium | 18 | suppressed |
| Colesevelam Hcl | Colesevelam Hcl | 17 | suppressed |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 17 | suppressed |
| Lacosamide | Lacosamide | 17 | suppressed |
| Moxifloxacin | Moxifloxacin Hcl | 17 | 14 |
| Raloxifene Hcl | Raloxifene Hcl | 17 | suppressed |
| Wixela Inhub | Fluticasone Propion/Salmeterol | 17 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 16 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 16 | suppressed |
| Fludrocortisone Acetate | Fludrocortisone Acetate | 16 | suppressed |
| Glimepiride | Glimepiride | 16 | suppressed |
| Loperamide | Loperamide Hcl | 16 | suppressed |
| Niacin Er | Niacin | 16 | suppressed |
| Novolog Mix 70-30 Flexpen | Insulin Aspart Prot/Insuln Asp | 16 | suppressed |
| Humulin N | Insulin Nph Human Isophane | 15 | suppressed |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 15 | suppressed |
| Nano 2nd Gen Pen Needle | Pen Needle, Diabetic | 15 | suppressed |
| Nortriptyline Hcl | Nortriptyline Hcl | 15 | suppressed |
| Terbinafine Hcl | Terbinafine Hcl | 15 | 11 |
| Trospium Chloride | Trospium Chloride | 15 | suppressed |
| Anastrozole | Anastrozole | 14 | suppressed |
| Azelastine Hcl | Azelastine Hcl | 14 | suppressed |
| Hydralazine Hcl | Hydralazine Hcl | 14 | suppressed |
| Nabumetone | Nabumetone | 14 | suppressed |
| Topiramate | Topiramate | 14 | suppressed |
| Vitamin D2 | Ergocalciferol (Vitamin D2) | 14 | suppressed |
| Clotrimazole-Betamethasone | Clotrimazole/Betamethasone Dip | 13 | suppressed |
| Descovy | Emtricitabine/Tenofov Alafenam | 13 | suppressed |
| Dexamethasone | Dexamethasone | 13 | suppressed |
| Tobramycin-Dexamethasone | Tobramycin/Dexamethasone | 13 | 11 |
| Amlodipine-Atorvastatin | Amlodipine/Atorvastatin | 12 | suppressed |
| Betamethasone Dipropionate | Betamethasone Dipropionate | 12 | suppressed |
| Chlorhexidine Gluconate | Chlorhexidine Gluconate | 12 | suppressed |
| Colchicine | Colchicine | 12 | suppressed |
| Indapamide | Indapamide | 12 | suppressed |
| Januvia | Sitagliptin Phosphate | 12 | suppressed |
| Labetalol Hcl | Labetalol Hcl | 12 | suppressed |
| Nurtec Odt | Rimegepant Sulfate | 12 | suppressed |
| Omega-3 Acid Ethyl Esters | Omega-3 Acid Ethyl Esters | 12 | suppressed |
| Propafenone Hcl Er | Propafenone Hcl | 12 | suppressed |
| Sumatriptan Succinate | Sumatriptan Succinate | 12 | suppressed |
| Victoza 3-Pak | Liraglutide | 12 | suppressed |
| Dicyclomine Hcl | Dicyclomine Hcl | 11 | suppressed |
| Humalog Kwikpen U-100 | Insulin Lispro | 11 | suppressed |
| Levalbuterol Tartrate Hfa | Levalbuterol Tartrate | 11 | suppressed |
| Metoclopramide Hcl | Metoclopramide Hcl | 11 | suppressed |
| Naproxen | Naproxen | 11 | suppressed |
| Olmesartan-Hydrochlorothiazide | Olmesartan/Hydrochlorothiazide | 11 | suppressed |
| Oseltamivir Phosphate | Oseltamivir Phosphate | 11 | suppressed |
| Rivastigmine | Rivastigmine | 11 | suppressed |
| Toujeo Solostar | Insulin Glargine,hum.Rec.Anlog | 11 | suppressed |
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.
| Year | General Payments | Main payer | Explicit products | Company overlaps | Part D coverage |
|---|---|---|---|---|---|
| 2025 | $316.33 · 22 records | Amgen Inc. | ELIQUIS, NURTEC ODT, OTEZLA, REPATHA, ZAVZPRET | 3 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Eliquis play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with PFIZER INC.?
- Are there reasonable alternatives I should understand when we discuss treatment options?
- How should I interpret the industry-payment records shown here in the context of my care?
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
How to read this page
- Payment and Medicare prescribing data can cover different years; every comparison shows both years explicitly.
- Part D does not represent a doctor’s entire practice; it excludes many patients and is subject to CMS public-release thresholds.
- Company–drug relationships must have an auditable source, a precise relationship type, and a valid evidence period. Unresolved mappings are not published.
- Generic drug claims are not attributed to a specific manufacturer without manufacturer-level evidence.
- When a source extract is incomplete, missing rows are never treated as proof of no payments or no prescriptions.
Loaded source releases
| Dataset | Year | Publication | Source |
|---|---|---|---|
| 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 |
Full methodology · Questions & answers · Report a possible error