We just got bit by a 4+ year old bug (See https://quality.livecode.com/show_bug.cgi?id=20859) where the revZIP library on macOS can create and read ZIP archives over 2GB, BUT the Windows library can not.

We distribute our desktop research application as "cross-platform" for macOS and Windows and just had a researcher on macOS build a "package" (our term for a custom ZIP archive our LiveCode app can make of the researcher's data files) over 2GB and sent to their Window colleague who can NOT open it.

Yes, we walked the Windows researcher through unzipping the archive with WinZIP and accessing all the data files manually, but so much for the "elegance" of our app being cross-platform due to using LiveCode.

Now, do we add code to check the size and prohibit macOS users from creating "packages" over 2GB so if they are sent to a Windows researcher, they can be opened OR do we just warn the Windows researcher if the archive is over 2GB that they will not be able to open it? Neither is a good option.

This just makes us look bad.

Paul Dupuis
Researchware

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