VM:Tape provides a User MACLIB named VMTUSER MACLIB. This MACLIB is loaded to the VM:Tape RUNTIME disk, usually the VMTAPE virtual machine's 192 minidisk.
The VMTUSER MACLIB contains any VM:Tape-specific MACROs that you may need to compile VM:Tape User EXITs. Include the VMTUSER MACLIB on your GLOBAL MACLIB command. By doing so, you ensure that any MACRO or COPY files that the MACLIB contains are found when they are needed.