DFS1080A INVALID `region type`

Explanation
 The Sequential Buffering (SB) test program (DFSSBHD0)
was executed in an invalid region type. The batch region type specified
in the first subparameter of the //EXEC PARM field must be DLI, DBB,
or ULU.

System action
 IMS abnormally terminates the test
program.

User response
 Correct the region type.