We had a short Discussion about Universal/REALstring.cpp Errors occurring in the mySQLCommunity Plugin in this Thread (2013/08) and @Joe Ranieri said that Xojo Inc. is looking for a better solution then turning off the MultiThreaded Option.
One of my Users does still see this issue from time to time, in an App (64Bit) build on macOS High Sierra for Windows 10, made with Xojo 2018 1.1.
Do we have a better solution then turning off MultiThreadding, now? 