The preloader control file

A control file identifies the HCL Integration Platform maps and database query (.mdq) files that the HCL Integration Platform CICS preloader utility loads into memory. You allocate the DTXnnnIN preloader control file in the CICS startup JCL.

The ddname of the preloader control file resource must be DTXnnnIN, where nnn is the HCL Integration Platform version, for example DTX841IN. The preloader control file must have a fixed-block record format (RECFM=FB).

For example, the following DD statement allocates a preloader control file that is named KEYWORD.MAP in the CICS startup JCL:
//DTX841IN DD DSN=KEYWORD.MAP DISP=SHR

The preloader control file cannot be the DnnnMAP VSAM file (where nnn is the HCL Integration Platform version).