Hi, for years I have used LyX with version control (GNU rcs) on a number of documents which I regularly revise. It has proved very useful for that purpose.
Trying to check out one of these documents I ran into trouble yesterday, however. LyX threw up an unexplained error box indicating that trying to use co (checkout) had resulted in an error. All other attempts (rolling back the last check-in or trying to register a new document with rcs) also failed. I use GNU RCS 5.9.0 which appears to be the most recent, on a Mac with High Sierra (10.13.2) and LyX 2.2. Updating to LyX 2.3rc1 made no difference. I am not sure whether the last successful use of rcs with LyX predates upgrading to High Sierra, otherwise there were no changes to my setup. Having checked the mailing list archive, I find no recent discussion of problems around rcs. If anyone has an idea where the cause of the error may be or any suggestions what else I should try I'd be very grateful! Thanks and best wishes, Andreas
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