HTTP 500 "Unknown Error" when using CM360 API v4

[Matt Furey]

Hi,

I am reporting a critical and persistent server-side error HTTP 500 that has recently broken a long-running ETL process that pulls reports from the Campaign Manager 360 (CM360) API.The issue is a repeatable bug on the CM360 API server affecting the utility endpoint used for dimension lookup and validation.

Issue Summary:

• Error Response: "HttpError 500 when requesting https://dfareporting.googleapis.com/dfareporting/v4/userprofiles/{profile_id}/dimensionvalues/query?alt=json returned "Unknown Error.". Details: "[{}]""
• Failing API Method: dfareporting/v4/userprofiles/{profileId}/dimensionvalues/query
• Failing Dimensions: The error occurs on all Floodlight-related dimension lookups tested:
  • activity (Floodlight Activity ID/Name)
  • floodlightConfigId

Our code has run successfully for over two years until this recent failure. The HTTP 500 error occurs only when calling dimensionValues().query for the dimensions "activity" and "floodlightConfigId". We confirmed that when we manually bypass the dimensionValues().query API call (i.e., we skip the error-prone validation step), both our Standard and Floodlight reports successfully execute using the main reports().run() API method.

Thank you in advance for your help on this!

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[DCM API (DoubleClick Campaign Mgr)]

Hi,

 

Thank you for reaching out to the DCM API support team.

 

I understand that you are observing "500 unknown error" with the dimensionValues().query end point for all Floodlight-related dimensions. In order to investigate further can you please share us with the following details:

 

• DCM Account Id
• Profile Id
• Complete JSON request and response logs

 

You can send the details via Reply privately to the author option, or direct private reply to this email. 

Thanks,
 

DCM API Team

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[2025-11-03 16:35:09Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01vSU8G:ref" (ADR-00338310)