| Error Code | Possible Causes | Resolutions |
|---|---|---|
400 PRECONDITION_FAILED |
The reader you are trying to delete with DeleteReader still has active entitlements. |
Remove all entitlements from the reader, or use the force=true option with the DeleteReader`request. |
403 PERMISSION_DENIED |
|
|
404 NOT_FOUND |
The specified publicationId or ppid doesn't exist. |
Verify that the provided publicationId and ppid are correct and exist. |
Error handling
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Last updated 2025-06-13 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-06-13 UTC."],[[["\u003cp\u003eServices return a 500 error code when they experience a failure.\u003c/p\u003e\n"],["\u003cp\u003eA 404 error code indicates a resource, like a reader or publication, was not found.\u003c/p\u003e\n"],["\u003cp\u003eWhen a valid resource isn't accessible to the OAuth service account due to permissions, a GCP IAM error is triggered.\u003c/p\u003e\n"]]],[],null,["# Error handling\n\n| Error Code | Possible Causes | Resolutions |\n|---------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `400 PRECONDITION_FAILED` | The reader you are trying to delete with `DeleteReader` still has active entitlements. | Remove all entitlements from the reader, or use the `force=true` option with the [`DeleteReader`](/news/subscribe/subscription-linking/api/methods#deletereader)\\`request. |\n| `403 PERMISSION_DENIED` | - The service account is not associated with [the Google Cloud project](/news/subscribe/subscription-linking/implementation/synchronize-user-entitlements#google_cloud_setup) you configured in Publisher Center. \u003c!-- --\u003e - The service account lacks the required role for the method being called (e.g., a `Subscription Linking Viewer` attempting to update entitlements). | - Verify that you have configured the correct Google Cloud project number in Publisher Center. \u003c!-- --\u003e - If you are using Account Default Credentials (ADC) with [`gcloud auth application-default login`](https://cloud.google.com/docs/authentication/application-default-credentials#personal) command, ensure you have [`Service Account Token Creator`](https://cloud.google.com/iam/docs/service-account-permissions#token-creator-role) role. \u003c!-- --\u003e - Ensure the service account has [one of the roles](/news/subscribe/subscription-linking/implementation/synchronize-user-entitlements#create_a_service_account). - Subscription Linking Admin \u003c!-- --\u003e - Subscription Linking Viewer \u003c!-- --\u003e - Subscription Linking Entitlements Viewer |\n| `404 NOT_FOUND` | The specified `publicationId` or `ppid` doesn't exist. | Verify that the provided `publicationId` and `ppid` are correct and exist. |"]]