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Upgraded to 12.6 from 11, locked up twice, will not terminate, Win7

Running Win 7 Pro 64 bit with 32G, 30-40% memory usage, very stable workstation.
DO 11 ran flawlessly. Just upgraded to 12.6 (latest) and in two days has locked up hard twice. Once right-click on a zip file, once for no apparent reason. One was open on a network shared drive, the other on a CD drive, both had two listers horizontal.

When it locks, I cannot terminate even with Task Manager. Have to reboot to get rid of it.

Searched here but see nothing similar.

Suggestions?

If it was that on its own, I'd suspect a shell extension:

But that, and the other crash, suggests the underlying problem may be something low-level, like a driver or an antivirus scanner. As antivirus would potentially scan a .zip file when it was accessed to build the right-click menu, that makes it a possibility.

If it happens again, you should be able to create a dump file which we can use to see which components are involved in the problem:


While it's happening, please go to Task Manager, then the Details tab, right-click dopus.exe and select Create Dump File.

Do that 4 or 5 times, and it should create something like:

C:\Users\<username>\AppData\Local\Temp\dopus.DMP
C:\Users\<username>\AppData\Local\Temp\dopus (2).DMP
C:\Users\<username>\AppData\Local\Temp\dopus (3).DMP
C:\Users\<username>\AppData\Local\Temp\dopus (4).DMP
C:\Users\<username>\AppData\Local\Temp\dopus (5).DMP

The files will be large, but compress well.

If sending more than one file, using the 7z format instead of zip will give a much reduced size. You can do this via the Archive Files button in Opus.

Please zip or 7z the files and email them to crashdumps@gpsoft.com.au (it's best not to post full dumps publicly to the forum).