All CA XCOM Data Transport installations using CA ACF2 Security as their security interface must reassemble the CA ACF2 Security module for CA XCOM Data Transport.
Member ASMACF2U in yourhlq.CBXGJCL provides an example of assembling and linking this CA ACF2 Security module (see the appendix "Sample Files" in the CA XCOM Data Transport for z/OS User Guide). You must do this when you do a new install or upgrade CA XCOM in order to ensure that your security is in place and working.
Only - if you have an existing XCOMACF2 module that is already assembled and working for the current release of CA XCOM, and you have just upgraded to a newer release of CA ACF2, you may just relink the module. The yourhlq.CBXGJCL library contains a sample JCL procedure that can be used to link CA XCOM Data Transport's CA ACF2 interface module to the version of CA ACF2 that is running. Edit yourhlq.CBXGJCL (LINKACF2) to fit your particular installation. Next, submit the edited procedure as a job. Be sure to check for any unresolved references in the linkage editor output.