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I use an unsupported version of Dynamic .NET TWAIN to capture images from a flatbed scanner (usually Canon LiDE). I have deployed onto Windows 10 64-bit many times without any issues but one deployment is throwing the following error when attempting to find available scanning devices:
“Can not open source manager. Twain_32.dll / TWAINDSM.dll is missing or is in use by another application.”
So I copied TWAINDSM.dll to C:\Windows\SysWOW64 which resolved the error when logged onto the PC as an administrator. However, when a standard user logs on, the following error is thrown:
“Failed to create TWAIN progress! Error code is 1260.”
I copied TWAINDSM.dll to C:\Windows\System32 and assigned full control permissions for standard users but this didn’t resolve the issue.
What is it that requires elevated permissions? Any pointers as to what the issue might be would be much appreciated.