When the Scheduler ISPF interface is invoked, message "DATACOM NOT ACTIVE" appears.
At this time, both the Datacom MUF, and Scheduler started task are active.
The Datacom CUSLIB is a user-customized libraries and must be searched before the Datacom executable library.
The correct order is as follows:
//STEPLIB DD DISP=SHR,DSN=CAI.SCHED.CAILOAD
// DD DISP=SHR,DSN=CAI.DATACOM.CUSLIB
// DD DISP=SHR,DSN=CAI.DATACOM.CAAXLOAD