HP 3000 Manuals

User Logging Programmer's Guide

Incompatibilities With MPE V/E 

MPE XL supports User Logging to tape (TAPE) and disc (DISC). The only
features of the MPE V/E User Logging facility not currently supported in
MPE XL are logging to serial disc (SDISC) and cartridge tape (CTAPE).

MPE/iX 5.0 Documentation