Why DataStage Designer hangs when open a stage

From :  a topic in dsxchange.com

DataStage Designer appear to hang when it tries to display a stage using invalid screen coordinates.

This will happen every time you try to open a particular kind of stage.
The solution is to remove the saved screen coordinates
from the Windows Registry.

Close the Designer.
Use regedit to delete this key (and its subkeys):
HKEY_CURRENT_USER
                   > Software
                          > Ascential Software
                                  > DataStage Client
                                           > Designer

Then open a new Designer and test.

Thanks