What does HRESULT 0x8029020A (TBSIMP_E_SCHEDULER_NOT_RUNNING) mean?

TBSIMP_E_SCHEDULER_NOT_RUNNING

The TBS command scheduler is unavailable

TBSIMP_E_SCHEDULER_NOT_RUNNING (0x8029020A) means the TBS implementation cannot dispatch TPM work because its scheduler is stopped or unavailable. The caller has not reached TPM command semantics yet.

Evidence to capture

Record TBS service state, scheduler initialization, system shutdown/startup phase, RPC/service errors, and whether any TBS context can submit a trivial command.

Focused correction

Restore the supported TBS service/scheduler lifecycle and create a fresh context. Do not diagnose TPM key policy until commands can actually reach the TPM.

Technical references

• Microsoft: About TPM Base Services.
• Microsoft: TBS return codes.
• Microsoft: Tbsi_Context_Create.
• Microsoft: Tbsip_Submit_Command.