Xceed Zip for COM/ActiveX on x86/x64 Documentation
Xceed Zip control reference / Xceed Zip control error codes / xerNothingToDo constant
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    xerNothingToDo constant
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    Value

    509

    Description

    No files ended up being processed.

    Tips

    This can happen when all the files specified to the FilesToProcess property ended up being skipped (keep in mind that the SkippingFile event is triggered for each file that's skipped) due to reasons such as being unable to find or open the file. This can also happen if you try to delete files from an already empty zip file.