I found that SET CLASSLIB is accepting more characters than RELEASE CLASSLIB.
I had the situation where I was able to do SET CLASSLIB TO DYNAZIP IN F:\dir\dir\dir\dir\dir\file.exe ADDITIVE but was unable to do RELEASE CLASSLIB DYNAZIP IN F:\dir\dir\dir\dir\dir\file.exe because only the first 34 characters are passed to that function. In my case, I add 35 characters so I was short by one.
Comments?