My guess is that you're including the model file which has got a library definition within it. When you include a model file with a library in it, you need to specify the name of the "section" that you want to include (this is often the process corner that you're trying to simulate). Take a look at the model file and see if it has libraries and sections within it, and make sure you're giving the section name in the include statement:

Code:

include "file" section=NN 

for example - or in ADE, in the model libraries form, specify the section name there.

Regards,

Andrew.