Cause: Error within the lock operation ( Local Table Overflow)

Experts

W observed, Incidentally when user tries to peform some business transaction, suddently the Lock table get fills up with and all other users get "System Lock error"

either we log off user and after some time when user tried to perform same transaction.

the system and as well lock entries of that user is normal.

Why incidentally incidentally it is happening. We checked with user and they confirms they were doing normally nothing really change compare to their day to day activities.

Rgds