For each ++ZAP element within a SYSMOD, SMP/E looks for all the load modules to which the distribution module was either linked or copied (similar to the processing done for ++MODs). SMP/E then attempts to install the superzap to each of these load modules. If the load module being zapped contains a CALLLIBS subentry, the SMPLTS version of the load module is also zapped, if the load module also contains XZMOD subentries, or if the set-to zone does not have an UPGLEVEL subentry.

In applying the ZAP, SMP/E performs two passes: the first to process the VER control cards, and the second to process the REP control cards. The REP pass is performed only if the VER pass has been completed successfully for all load modules to be changed.