BCDA Export Request Failing with Attribution File Not Found Error

[Muhammad Ishtiaq.]

Dear BCDA Support Team,

We are encountering the following error while executing the BCDA export request:

{
  "issue": [
    {
      "code": "not-found",
      "details": {
        "coding": [
          {
            "code": "Request Error",
            "display": "failed to start job; attribution file not found for given _since parameter.",
            "system": "http://hl7.org/fhir/ValueSet/operation-outcome"
          }
        ],
        "text": "failed to start job; attribution file not found for given _since parameter."
      },
      "diagnostics": "failed to start job; attribution file not found for given _since parameter.",
      "severity": "error"
    }
  ],
  "resourceType": "OperationOutcome"
}

Could you please help us understand the root cause of this issue?

We would like to know:

• What exactly does this error indicate?
• Does it mean attribution data is unavailable for the provided _since parameter? 
• Is there any specific date range limitation or attribution file dependency we should be aware of?
• What would be the recommended resolution for this issue?

Please let us know if any additional request details are required from our side.

Thank you for your support.

Best regards,
Muhammad Ishtiaq
DataQHealth 

[Beneficiary Claims Data API (BCDA) Community]

Hi Muhammad, 

Sorry to hear you are running into some export errors. We have had some recent attribution update delays, but would not expect them to continue causing this issue. To help us troubleshoot, can you please share your 5 digit ACO ID?

• What exactly does this error indicate? Does it mean attribution data is unavailable for the provided _since parameter? 

• • This error means that we did not have updated attribution for your ACO during the window indicated by your _since parameter. 

• Is there any specific date range limitation or attribution file dependency we should be aware of?

• • Typically, not on the request side. BCDA requires attribution to be updated at least every 45 days, but that is handled by the BCDA team.

• What would be the recommended resolution for this issue?

• • Please retry your export request without the _since parameter. 

Thank you, 

The BCDA team

[Muhammad Ishtiaq.]

Hi Team,

Thank you for your response.

Please find the requested ACO details below:

ACO Name: [Summus_Health_MSSP]
ACO ID: [A5858 ]

Regarding your questions:

Yes, the error indicates that attribution data is unavailable for the provided _since parameter.

RequestUri = {https://api.bcda.cms.gov/api/v2/Group/all/$export?_type=Patient,ExplanationOfBenefit,Coverage&_since=2026-01-01T00:00:00.000-05:00}

We are not seeing this issue with our other two ACOs, and data extraction is working successfully for them. The issue appears to be specific to this ACO only.

We also retried the export request without the _since parameter as recommended, but the request still failed with the same issue.

Could you please investigate whether there is any attribution-related issue or missing attribution file associated with this ACO?

Thank you for your support.

Best regards,
Muhammad Ishtiaq

DataQhealth 

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[Beneficiary Claims Data API (BCDA) Community]

Hi Muhammad, 

We have confirmed that BCDA has been receiving monthly CCLFs for A5858 beginning with a file generated January 20, 2026 and received on January 29. The most recent was generated on April 6. Per our request logs, it looks like the last request you made without the _since parameter was for runout data. While we have 2026 attribution files for your ACO, we do not have a 2025 runout attribution file, so that failure is expected. 

Please try a /Group/all export request either without the _since parameter, or using a _since parameter of 2026-01-30, and let us know if you are still seeing this issue. 

Thank you, 

The BCDA team