It turned out that PipingSellmeijerRevisedTests.cs already existed. It should have been named WtiPipingSellmeijerRevisedTests.Related to Issue [MWDAM-1388]
First step: make room for a 2Dprofile as type next to existing 1Dprofile and sti-file. Renamed type/properties so they now comply with the Engine.Related to Issue [MWDAM-1380]