The name of the DDM module is based on the VSAM file name
and controlled by the
CICS®
VT exit VIDDDMEX. If you choose
a DIM name of 7 characters or less, the default VIDDDMEX adds the
character '#'
to the end. For example, if you select MYFILE as the name of a DIM,
the DDM name using the default VIDDDMEX becomes MYFILE#.
Avoid using 8-character DIM names. For example, if you select DIM names MYFILE01 and MYFILE02, the DDM in both cases becomes MYFILE0# and the second DDM you generate will overwrite the first. If you have to use 8-character DIM names, you must develop your own version of VIDDDMEX to avoid this.
The default VIDDDMEX module is supplied in load form in cvt210.SVIDLODE. The exit source and JCL to assemble and link the default module is supplied in my.SVIDCNFG.custom member VIDGDMEX.
Steps in the IVP will fail if you change the default exit. If you decide to change the default exit, wait until all parts of the IVP have been run successfully.