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The XcdErrorNoZipFile constant is a value indicating that the archive file specified in the ZipFileName property was not found. This error occurs when the archive file must be found in order to proceed. If the nature of the current operation allows a new archive file to be created, the XcdWarningNoZipFile warning would occur instead of this error. For example, during the execution of the Extract, Fix or UpdateZipDate methods, an archive file must be found in order to proceed.
If you are specifying a ZipFileName using relative paths (a path relative to the current directory), be sure the current directory is what you expect it to be.