Hello All, Just would like to update that, I didn't see the below reported issue on the HW. I was able to clear the TPM with authorization password set at time of provisioning. Regards Phani Srinivas S From: Phani Srinivas Sent: Wednesday, August 12, 2020 9:04 PM To: tpm2(a)lists.01.org Subject: FAPI delete issue Hello All, Having using FAPI API's for a while for some exploratory work, I have provisioning the FAPI with a password using the following call and used macro set to PASSWORD set as "1234" rc = Fapi_Provision(global_fapi_context,PASSWORD,PASSWORD,PASSWORD); Again tried to clear the TPM using the following calls after doing the FAPI_Initialize. rc = Fapi_SetAuthCB(global_fapi_context, auth_callback, NULL); if (rc != TSS2_RC_SUCCESS){ printf("Failed to set the callback \n"); } printf("clearing the TPM \n"); rc = Fapi_Delete(global_fapi_context, "/"); if (rc != TSS2_RC_SUCCESS){ printf("Failed to clear TPM\n"); ret = ERR_FAIL; } But I see the following error, ERROR:esys:src/tss2-esys/esys_iutil.c:1070:esys_GetResourceObject() Error: Esys handle does not exist (70018). ERROR:fapi:src/tss2-fapi/fapi_util.c:380:ifapi_set_auth() Set auth value. ErrorCode (0x00070018) ERROR:fapi:src/tss2-fapi/api/Fapi_Delete.c:377:Fapi_Delete_Finish() ErrorCode (0x00070018) Set owner authorization ERROR:fapi:src/tss2-fapi/api/Fapi_Delete.c:89:Fapi_Delete() ErrorCode (0x00070018) Entity_Delete Failed to clear TPM Any thoughts what went wrong here. Regards Phani Srinivas S