The following abend
0S04I ILLEGAL SVC - HEX LOCATION 00780206 - SVC CODE HEX 84 and 11S78I JOB TERMINATED DUE TO PROGRAM ABEND
can occur from XCOM jobs that are executed without specifying the OS390 parameter at the end of the EXEC statement to specify OS/390 emulation services.
The abend can happen from the startup of the server program XCOMXFER, the transfer program XCOMJOB or the XCOMUTIL program.
The OS390 parameter is required, and must be placed as the last keyword on the EXEC statement when running XCOM jobs, as instructed in the CA XCOM Data Transport for z/VSE Getting Started Guide for 3.1, for example:
// EXEC XCOMJOB,SIZE=(XCOMJOB,48K), X