#43 VS2013 NullPointer on entering sample population

[Jan Pieter Wijbenga]

Crash on entering Sample Population for fact type (fact type that is in error mode).

Reproduce:
by adding the attched orm file to a new VS2013 sln.
FT: Profile has TimeStepSize. Enter '5 minutes' or '5' ...
Then this unhanndled exception occurs.

System.NullReferenceException was unhandled
Message: An unhandled exception of type 'System.NullReferenceException' occurred in Microsoft.VisualStudio.VirtualTreeGrid.dll
Additional information: Object reference not set to an instance of an object.