Error when open Obi 3.9

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Hello,
I installed 'Obi 3.9 64 bit' on my computer (windows 10 64 bit) and record a book. But another day when i tried to open book then a dialog box appear and show a message "Warning!, The previous session of Obi was terminated abruptly. The log file ObiSession.log is created on the Desktop.". Tired to open Obi program but terminate always. What's the solution?

The text of obi session log is below;
.......
System.NullReferenceException: Object reference not set to an instance of an object.
at Obi.ObiForm.AssignMenuShortcuts(ToolStripMenuItem m, Boolean isFirstTime)
at Obi.ObiForm.AssignMenuShortcuts(ToolStripMenuItem m, Boolean isFirstTime)
at Obi.ObiForm.AssignMenuShortcuts(ToolStripMenuItem m, Boolean isFirstTime)
at Obi.ObiForm.InitializeKeyboardShortcuts(Boolean isFirstTime)
at Obi.ObiForm.InitializeObi()

Regards
Rajendra

Hello Rajendra,

Thanks for mailing to Obi forum.

While recording the book or closing Obi did you get any error?
If you are still facing error, you can do hard reset.
The keyboard shortcut for hard reset is Ctrl+Alt+F10.
Open Obi and press these keys.

Thanks & Regards
Rachana

Hi,
I didn't get any error when recording and closing the Obi.

I did hard reset today but not response again. Only showing that warning dialogue.
I uninstalled the previous installation and install again but not work yet. But Obi 3.8 working well, what's the reason?

Thanks & Regards
Rajendra

Hello,

Please install Obi 3.9.
Start Obi from Desktop/Start menu.
When you get that error window,press OK button.
Now you should see obi with no project.
Press CTRL + ALT + F10 key to hard reset.
Hard reset preference window will ask to confirm,press Yes button.
Again press Yes to confirm.
Hard reset for User registration window will come, you can either press Yes or No. On pressing Yes,you have to register again.
Operation successful window will be on screen.
Press Ok, close Obi and then restart.

Obi should work fine on your system.
Earlier did you followed the same steps?

Thanks & Regards
Rachana

Hi,
I did that but when I pressed 'Ok' on error window/dialogue box the obi didn't any response and not opened.

Regards
Rajendra