Sonar X2a- fatal error when i try to open piano roll!

I have this with Staff view in X1.

It is not fixed and Cakewalk was baffled after looking at the dmp file.  Sweetwater has worked very hard on this and can't figure it out.

It seems I can minimize the problem if I have another view open first.  For example, if I open event list and just leave it open and docked, I seem to be able to open and close Staff view as needed.  That said, I had one Staff view crash this week-end.

At this time, I am just living with it.  Luckily, the trick about opening the other view seems to make the problem way less frequent.

this problem has been fixed like that:
Information transmitted by Dan Gonzales from Cakewalk

1) Open the Run Prompt by holding down the Windows Key on your computer and pressing "R"
2) In the Run prompt type in the following and press [OK]: C:\Program Files\Cakewalk\
3) Delete the "SONAR X2 Producer" folder contained within

4) Open the Run Prompt by holding down the Windows Key on your computer and pressing "R"
5) In the Run prompt type in the following and press [OK]: %appdata%\Cakewalk
6) Delete the "SONAR X2 Producer" folder contained within

7) Open the Run Prompt by holding down the Windows Key on your computer and pressing "R"
8) In the Run prompt type in the following and press [OK]: %allusersprofile%\Cakewalk
9) Delete the "SONAR X2 Producer" folder contained within

Next you will want to delete your SONAR related registry keys by doing the following:

10) Open the Run Prompt by holding down the Windows Key on your computer and pressing "R"
11) In the Run prompt type in the following and press [OK]: regedit
12) Click [OK] will launch the Registry Editor. If prompted with a message "Do you want to allow the following program to make changes...", 
click [Yes].*****
IMPORTANT: When you access the Registry Editor, create a backup by going to File > Export. In the Export menu, make sure you have "All" 
selected and that the "Save As Type" is set to "Registration Files (*.reg).

It is very important to create a backup of your registry because if you accidentally delete a registry key there is no undo function. 
You can, however, double-click on the Registry backup you made above to re-import your registry keys if you make any mistakes. 
You MUST re-import your backup (if needed) before restarting your computer.
*****

13) Now delete the following Registry keys:

HKEY_CURRENT_USER\Software\Cakewalk Music Software\SONAR Producer\X2
HKEY_LOCAL_MACHINE\Software\Cakewalk Music Software\SONAR Producer\X2


IMPORTANT: You will want to delete the "X2" folder at the end of these strings of keys. Do this by right-clicking on the ""X2" 
folder and selecting "Delete". Only do this for the "X2" folders in the locations above. If you do not see these ""X2" folders, 
proceed to the next step.

*Please note that this will remove any effects presets and key bindings you may have made in Cakewalk. 
You can back these up separately if you like from SONAR's Plug-in Manager and Color and Key Bindings menus.

At this point, you will want to re-install the product. We recommend temporarily disabling your startup programs by doing the following:

14) Open the 'Run' command again and type in the following: msconfig
15) Click [OK] and then click on the Startup tab at the upper right of the window that opens.
16) Uncheck all items listed, click [OK], then restart your computer. You can always recheck those items again at a later time.
17) Reinstall SONAR X2