Hi guys I am facing same issue while I am opening Web baclient ,But it continues dsmcad process.
We are using TSM 5.5
09/25/17 13:39:29 ANS1570E Registering this instance of the Cad with the server failed. Cad process continues.
09/26/17 04:31:34 Unable to locate valid trusted communication agent.
09/26/17 04:31:34 tcaPath is >/usr/bin/dsmtca<. rc is 138
09/26/17 04:31:35 ANS1501E Trusted agent execution/owner permissions are invalid
09/26/17 04:31:35 ANS1520E Failure writing to the Tivoli Storage Manager error log: errno = 13, The file access permissions do not allow the specified action.
09/26/17 04:31:38 Unable to locate valid trusted communication agent.
09/26/17 04:31:38 tcaPath is >/usr/bin/dsmtca<. rc is 138
09/26/17 04:31:38 ANS1501E Trusted agent execution/owner permissions are invalid
09/26/17 04:31:38 ANS1520E Failure writing to the Tivoli Storage Manager error log: errno = 13, The file access permissions do not allow the specified action.
09/26/17 08:54:17 ANS1052E Direct connection to the Storage Agent is not allowed.
09/26/17 08:54:17 ANS1570E Registering this instance of the Cad with the server failed. Cad process continues.
09/26/17 08:57:15 ANS1141W Unknown command - exit
09/26/17 08:58:35 ANS1052E Direct connection to the Storage Agent is not allowed.
09/26/17 08:58:35 ANS1570E Registering this instance of the Cad with the server failed. Cad process continues.