Cause
If you cannot open the specific project file but can open other project files, then that file may have a problem.
Solution
The project file that did not open properly may have a problem. Copy the data and transfer the copied project file again. For the copy procedure, see the following section.
8.6.2 Copying a Screen from Another Project
The contents which can be copied with [Copy from another Project] are the contents of the base screen and window screen only. Since other content cannot be copied, you need to set those parameters again.