I couldn't get either suggested solution to work for me. I started playing about with the data sets, the options and the FCMP itself and still couldn't get it to work. However, i noticed that the message didn't come up when I started a new SAS session, only during subsequent runs - even after I deleted the data set. This made me think that resetting the CMPLIB option to () wasn't resetting SAS to the default, it was just setting it to "()" I did find that setting the option to: options cmplib = _null_; before the FCMP seemed to stop the message appearing. ... View more