PEI,
We did the forensics and the issue was the different ROC values in the system, and the associated difference in the angle of the surface to the 200' ROC, just happened to pick up some terrain. Rather than null, just bumped the procedure over a little
Its always interesting to see how the different manufacturers equipment works and calculates.
It also shows, that even though a 0.3RNP or 0.1 RNP procedure works just fine, some of the systems on the ac just wont play.