There could be any number of reasons for an ARL update failure. The first place to check is at the end of the recognition.log file which resides in either of the following directory locations -
1. If the ARL scheduled task is set to run under the SYSTEM account - C:\Windows\Temp\
2. If it's set to run under a specific user or domain account - C:\Users\<username>\AppData\Local\Temp
There are some instances where the failure can occur prior to anything being written to this log file. If this is the case, you'll need to run the ARL updater executable manually from the a command line in order to capture the error message. It can be launched without any additional command parameters -
See below if this process returns the following error message -
'Command could not be executed - make sure SQL Client Tools are installed at Core Server'
If the 'SQL Client Tools' error message is returned, check to see if the Recognition.exe file exists in the DotNet\bin folder. If it is not, please contact technical support so that they can supply you with the appropriate version of this file.