ArrayFilter in a List SO

[Mark Terry]

I have a file with a field that contains comma-delimited id numbers  
that refer to records in another file. I want to display the names  
associated with those id's in a list SO. I tried  
ArrayFilter(replace(CoIDs,",",¶),¶,{lookup... etc.}) and Panorama  
quit. Further testing showed I can't get even the simplest  
ArrayFilter( to work as the formula for a List SO. I can work around  
this with a procedure and a variable, but I'm curious if this is a  
bug, or just a known limitation (was there life before  
call( functions?), or perhaps I'm trying to do something I shouldn't?

M