MBCE000-ERROR IOERR (00040210) ON SET FILE IN MBCPCMFI

Q:

OPEN MYFILE                                                                           
    MBCE000-ERROR IOERR (00040210) ON SET FILE IN MBCPCMFI  
    What does the message mean and how do I fix it?

A:

Look in the SYSLOG for additional information relating to MYFILE. Usually the file is in use by another job or user.