When deleting existing phases followed by adding new phases in a project made in PLAXIS 3D AE or older, this can lead to a crash (bug report) in PLAXIS 3D 2016:
When looking more into the details (show bug report), the first line in the call stacks will refer to an error in
TSIPsStateInPhaseList_Read.GetByPhase_Read
This issue is now solved in PLAXIS 3D 2017.00
When using the PLAXIS 3D 2016 with existing projects created in older versions and you want to modify your phases you are advised to: