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Could not update or replace a file in the zip file without using a temp file.
This can happen only when you have set the UseTempFile property to False and are adding files that already exist in the target zip file. The library is able to append files to an already existing zip file, without using a temporary file – but if some files already exist in the zip file and need to be replaced, then the library will skip those files. You can remedy the situation by turning on the use of temporary files with the UseTempFile property.