When clicking on the "ADD" or "EDIT" button on a cListObjEdit form I get the following error:

Error# 1881
Message GL_MMDEBUILDER
Line 14
Code loObject = CREATEOBJECT(tcClassName,@tuParm1,@tuParm2,tuParm3)
Method: doform
Object contform1.pgfbizobj.page4.clistobjedit11.cmdedit

I have had this once before, but I cannot remember what the problem was. Can anyone give me a tip on this error?
Thanks Allan Godney