3120151 - Error PU815 while running UCCHECK

While performing actions (such as saving a Z program) during the UCCHECK execution you face the following error:

Message No. PU815

Diagnosis
An operating system file (the SAPNAMES file of user XXX) could not be accessed from the program that is running, since it is locked by another transaction.
The name of the lock file is "...\sapmnt\trans\tmp\XXX.LOS"

SAP NetWeaver - All releases

Unicode, Conversion, Non-Unicode, Pre-Unicode, Steps, Program, Preparation , KBA , BC-I18-UNI , Unicode , Problem