Any idea's on this one. I have a third party panel ( by Paul Roberts) installed in an Easyjet 737 which operates perfectly. The problem is that when I put this panel in some other aircraft, (not all) Installation is no problem, but when you select aircraft, you can only get the panel if you have selected say, the Easyjet, are in cockpit view, then select the change of aircraft. If you try to select after opening FS, or try when in outside view of aircraft already selected, the aircraft shows as normal, but when cockpit view is selected, up comes the error report and subsequent reload.
I wait in anticipation

Tony C