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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 discriminator: Test communication with TPM Base Services independently of the higher-level operation. This result isolates the TPM API-to-TBS path rather than TPM authorization or command semantics.
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