# Device Management Error Codes > **NOTE** > > This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](errorcode-universal.md). ## 11600101 Service Invoking Exception **Error Message** Failed to execute the function. **Possible Causes** An error occurred during internal invocation. **Solution** Call the API again. ## 11600102 Failed to Obtain the Service **Error Message** Failed to obtain the service. **Possible Causes** The service is not started or fails to start. **Solution** Make sure the service is started and obtain the service again. ## 11600103 Authentication Unavailable **Error Message** Authentication invalid. **Possible Causes** The last authentication service is still in progress. **Solution** Wait until the last authentication service is complete and call the authentication API again. ## 11600104 Discovery Unavailable **Error Message** Discovery invalid. **Possible Causes** The last discovery service is still in progress. **Solution** Wait until the last discovery service is complete and call the discovery API again. ## 11600105 Publish Unavailable **Error Message** Publish invalid. **Possible Causes** The last publish service is still in progress. **Solution** Wait until the last publish service is complete and call the publish API again.