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It for sure helps. I was really thinking that I was overlooking something here. But with this explanation everything makes sense. The actual code in the DLL is substantially different to 4.0. In 4.0 most was just a very thin wrapper around existing LabVIEW functions. But those LabVIEW functions do not support Unicode paths so I have been refactoring that code substantially to support full Unicode paths for the underlying functions (and create compatibility wrappers that still use the old LabVIEW paths, which of course won't support Unicode path names). The advantage of using full Unicode throughout the ZIP tools, eventually will be that path names can contain characters not present in your current ANSI locale and that path names can be almost arbitrarily long, namely 32k characters. The ZIP standard internally already supports UTF8 encoded file names, so once this is fully working you can also extract and create ZIP files that are using UTF8 filenames. But this complete porting to full Unicode support is not yet finished. Most of the actual programming is done, but it needs more testing.