S322 is a system abend (abnormal end) code in IBM mainframe JCL that indicates a time-out condition. This occurs when a job step exceeds the time limit specified on the JOB or EXEC statement. Unlike S322, other abend codes have different causes: S X37 is dataset out of space, S0C7 is caused by invalid data in numeric fields, and S013 is a storage violation error. S322 is specifically time-related.