System.NullReferenceException at ORTS.SignalWorldObject..ctor (Paris Metro route fails to open)

[David Martin Lewis]

The Paris Metro route (RFSP-V3_6) crashes at startup.

Log file is attached.

Dave (J72fan)

[r.roeterdink (r-roeterdink)]

It has not been possible to determine the cause of this crash.
 However, for other routes with similar problems it has been found that these problems were caused by spurious world files in the WORLD directocy.
 These spurious world-files often also contain signals which have references to tdb-entries within the valid range, but which are double as these tdb reference actually refer to signals in other world-files that are still valid. These double references causes severe errors as various cross-references will either point to invalid items or not be set at all. This invariable causes a program crash.

To change the program in order to be able to handle these errors would require extensive changes to the processing and probably even to the data structure itself, which would lead to more extensive changes being required throughout the signalling process.
 In view of the limited resources in the project team and given the fact that very few routes are affected and the cause of the problem is within the route data rather than with the program, it has been decided that no effort will be made to resolve this problem.

So, no fix will be provided for this crash for the foreseeable future.