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

    515

    Description

    The library was instructed to remove or add files to an existing spanned or split zip file. This type of operation is not supported.

    Tips

    The spanned or split zip file must be recreated without the files you want to remove, or recreated with the entire group of files that you want it to contain.