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TPMAPI_E_TBS_COMMUNICATION_ERROR
TPMAPI_E_TBS_COMMUNICATION_ERROR is a Windows TPM API result. It indicates that the TPM API could not exchange the request with the Windows TPM Base Services layer.
What to check for TPMAPI_E_TBS_COMMUNICATION_ERROR
- Check the TPM Base Services service state, Windows event logs, and any earlier TBS HRESULT.
- Verify that the TPM is enabled and visible to Windows in firmware settings.
- Retry after restoring service and device health rather than resubmitting a potentially stale context.
Microsoft documentation for TPMAPI error codes
Diagnostic interpretation
This result has the HRESULT value 0x8029010B. AllStat records the condition as “An error occurred while communicating with the TBS.”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the tpmapi / tbs / communication operation.
- Preserve the first failure in the call chain; a later HRESULT can describe cleanup rather than the original tpmapi / tbs / communication condition.
Retry and recovery
Treat TPMAPI_E_TBS_COMMUNICATION_ERROR as a checkpoint, not as a request to loop. Retry only after evidence shows that the rejecting state has changed, and verify the same scenario end to end.
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