Problem Description
How to fix the Schedule export functionality if it has stopped working and displays errors inside a ProjectWise managed workspace?
Solution
Open the WorkSpace.cfg file inside your PW managed workspace and check whether the “%undef DG_SCHEDULES_DIR” variable has been added. If it has, this variable can cause the export functionality to fail.
If this variable is added, then remove it from the CFG file and save it. After that reopen OpenBuildings Designer and when you export from the Schedules tool again you should see that it works without any error.