Pack and Go ZIP function does not support German "Umlaut"

If I use the Pack and Go function to send assemblies to other stations, and I use the "ZIP" function of the dialog box, each part containing an "Umlaut" such as "ä", "ö", "ü" in the file name, is renamed by the packing tool. Crazy names are generated, and the assembly cannot be reconstructed because of the modified filenames (anyway, it is possible to rename the files...).

Is it really necessary avoiding any "Umlaut" in filenames, or should there be done some trouble shooting in zipper programming at solidworks?

Thanks for helping

Johannes

SolidworksImport export