@User: Most compatibility issues have been resolved, but the basic inability of Xyce to handle a parameter that is used in the same line in which it is defined is a big problem. But there was a discussion about it in the #xyce channel, and Eric Keiter knows about the problem and has stated that he will address it. The other compatibility issue that I know of is that Xyce does not recognize level 3 diode. I have also talked to Eric about this and he also agreed to work on it.