UDC
Set UDC [ ON | OFF | filename] [ LOCK ]
(Default: ON)
(Initially: OFF)
ON | filename. Turning Set Udc to ON causes Qedit to search the system UDC catalog, Command.Pub.Sys, looking for the UDC files established with :Setcatalog. Qedit simulates those UDCs, either on MPE V or MPE/iX, but not every feature is emulated (for example, Hpmsgfence). Qedit searches the user UDCs first, then the account UDCs and the system UDCs. In this way, the system UDCs cannot be circumvented.
Set Udc with a filename causes Qedit to simulate the UDCs in that file, without searching Command.Pub.Sys (this is faster, and there is no need for a :Setcatalog command). You can repeat the command to load up to 20 UDC files (either permanent or temporary). You may need to specify file names explicitly if you have followed VESOFT’s advice regarding access to Command.Pub.Sys.
Set Udc OFF disables all recognition of UDCs by Qedit. The default is OFF, meaning no simulation of UDCs. Use Set Udc OFF and :Setcatalog with no parameters to un-catalog a user UDC file that you are editing. Otherwise you get Duplicate File errors on the Keep of the revised UDC file.
Lock Option. Once the lock option is entered, no further Set Udc commands are accepted by Qedit. This allows the system manager to control UDC processing via a Set Udc command in the Qeditmgr file. Note: For compatibility reasons, Set Udc Lock implies Set Udc On (i.e., global search).