This error can have 2 causes:
- BuildSoftServer.exe is blocked by the the FireWall or anti-virus.
Solution: disable the FireWall or add the BuildSoftServer.exe to the list of trused programs.
- Files with a long name are saved over network in a number of nested folders. The path towards the file becomes very long.
Solution: use less nested folders and/or shorten the file name and/or save the file locally