AllDup Shell Extension crash explorer.exe with long path

English support for the software AllDup
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masm
Posts: 1
Joined: 21 May 2025, 21:58

AllDup Shell Extension crash explorer.exe with long path

Post by masm »

Hello,

Just encountered a bug recently using AllDup 4.5.66 on Windows 11 Professional (Version 10 Build 26100).
I enabled long path support in the registry (see https://learn.microsoft.com/en-us/windo ... long-paths).
When right clicking in the explorer on a file having more than 260 characters in its full path, the whole explorer.exe crashes.
After investigation, the culprit is AllDup shell extension (KuShellExtension64.dll) : disabling this shell extension makes the crash disappear.

By the way, I realised some other shell extensions do not appear in the context menu when the file path is that long. I think they may have some kind of graceful error handling to ensure they do not crash explorer.exe even when they encounter an error. This may be lacking in AllDup's shell extension.
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