When I try to run the SU programs I get a
 
WARN-ERR-File: WBKLUGRID.SRC Line: 38  
You must specify a file handle for this function
 
and then a  
 
FATAL-ERR-File: WBKLUGRID.SRC Line: 42
The field you are trying to use is allocated. It may belong to a file that hasn't been opened yet, or was an array that was removed from memory - LUGRID-END
 
which I get several time with different line numbers. The program finally pops up, but all fields and look ups are empty and nothing works. I don't know what these are actually supposed to do, but I rather doubt that mine are functioning as intended.