Many things on many different CM software versions and hardware platforms are indications of software corruption.
This error message is one.
Error encountered, can't complete request; check errors before retrying
It is not always corruption. 90 % of the time it is. But, sometimes this is due to software bugs and can be resolved with loading a patch, rebooting your switch. Only an Avaya Tier 3 software engineer could tell you for sure. The answer would be based on the command that returns the error and the software error logs.
If you have maintenance with Avaya, they will fix it under your maintenance contract. If not, They charge T & M or to a BP block of hours. Rates for T & M for non-maintenance customers are over $ 600.00 an hour during standard hours.
Other errors that might mean that you have corruption issues with your software. It is not always a guarantee that these messages are indications of corruption.
WARNING: Translation corruption detected - Splash screen when you login System error; Please try again later - trying to save translation
Trying to change or remove administration
Identifier not assigned Identifier previously assigned; please select another Transient command conflict, please try again Transient data conflict detected, please try again Entry is bad Object in use; please try later
Object in use, sometimes means someone's talking on your station, trunk-group, trunk, or an agent is logged in. logging off the agent, busy the station, agent, trunk may allow removal. On a station, make sure no buttons have been pushed (i.e. date, timer, directory, etc.) press the normal button will idle all.