There are 3 levels of UDCs: SYSTEM, ACCOUNT, USER.
You can have 0, 1 or more files cataloged at each level.
Each file can have multiple UDCs that have OPTION LOGON.

BUT...

Only the FIRST UDC with OPTION LOGON in the first file at each level
will be executed starting with SYSTEM then ACCOUNT then USER. Note that
for non-OPTION LOGON (the default) the search sequence for a UDC name is
the USER then ACCOUNT then SYSTEM level.

Rexor wrote:
>
> Thanks again.
> The command "OPTION LOGON" in the UDC works but only if the udc is
> catalogued to the user level.
>
> This don't work with account and system level (I tried with the same UDC)
> (UDC not executed)
>
> Best regards,
>                         Fabien Visini
>                         Rexor