I'm no Windows expert, but something to look at quickly is whether the files in question reside on (or are backed up to) OneDrive or Sharepoint. Both of these "services" support a much more restricted character set in file and directory names than does Windows itself. It appears that Microsoft has in some way munged together the name space rules of Windows files and URL-style names. In some cases the request fails, and in others some kind of substitution is done automagically, but I have no idea what the rules are (or how OneDrive and Sharepoint overlap and interact with one another). I have talked with a couple of long-time app developers for the Windows platform, and they don't understand these rules either. Everything can be working fine, you move a directory into OneDrive so it's backed up "in the cloud", and things start breaking.
I have personally observed that on Windows 10 desktop with OneDrive, MS Office files such as Word .docx get their names magically changed on the fly if they contain certain newly unacceptable characters. I guess I'm saying that the problem might not directly be the change to Windows 2020 server, but perhaps a contemporaneous configuration change related to where files are stored. Good luck... Tony H. On Wed, 3 Jun 2026 at 13:16, René Jansen via Oorexx-devel < [email protected]> wrote: > Customer has upgraded to Windows 2020 Server and runs ooRexx 5.0.0 as a > service. Names of log files suddenly have ~ twiddles in them and have parts > in upper case which are not expected. On first encounter I suggested to > upgrade to 5.2.0 and then have a close look (which probably will start > tomorrow). > > In the meantime: does anybody have a suspicion of the cause? Is there a > known problem with this OS upgrade? Do we suspect 8.3 names or > uninitialised variables? > > best regards, > > René. > > > > _______________________________________________ > Oorexx-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/oorexx-devel >
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