older lyx file will not open

[Stephan Witt]

Am 04.12.2022 um 23:56 schrieb Ivan Werning <iwerning at gmail.com>:
> 
> Hi
> 
> Help! I'm having trouble with an important older LyX file not opening in LyX.
> 
> I'm a long time LyX user here. I am having trouble with an old file from 2014 that was created by LyX 2.1. I'm on a 2017 intel mac running OS 13.0.1 (Ventura).

Hi Ivan,

did you upgrade macOS and what was your previous version?

Most of the time users did an upgrade from macOS 12.3 or earlier. The upgrade process removes one crucial utility (python) from the system and replaces it by a new one which asks the users for download and install of the newer version. One has to notice it, interpret is and agree with.

See the ticket in LyX’s bug tracker: https://www.lyx.org/trac/ticket/12523

To check for this you may open a Terminal session and type the command
python3 -V

Either you get a version info or you’ll be asked to download and install the real software. This is required to keep LyX working.

BR,
Stephan

> When I try to open it in 2.3.6.2 I get filename.lyx  is from an older version of LyX and the lyx2lyx script failed to convert it.
> 
> #LyX 2.1 created this file. For more info see http://www.lyx.org/
> \lyxformat 474
> \begin_document
> \begin_header
> \textclass article
> 
> 
> I tried downloading earlier versions of Lyx to no avail. I completely failed with 2.1.5.  Here when I run LyX I am asked to reconfigure. I do, but I'm not sure it works.
> 
> The error messages I get are different: 
> 
> The module basic has been requested by
> this document but has not been found in the list of
> available modules. If you recently installed it, you
> probably need to reconfigure LyX.
> 
> Hit OK then...
> 
> The module theorems-ams has been requested by
> this document but has not been found in the list of
> available modules. If you recently installed it, you
> probably need to reconfigure LyX.
> 
> The module natbib has been requested by
> this document but has not been found in the list of
> available modules. If you recently installed it, you
> probably need to reconfigure LyX.
> 
> And it finally opens the file with a Parse error box complaining "Layout `Proposition' was not found."
> 
> At this point I have the file fully open, but it will not compile. Nor do I know what to do with it to take it to a newer version. I get no Export options and I tried copy pasting into the newer LyX and that did not work (I get again "[filname] is from an older version of LyX and the lyx2lyx script failed to convert it.")
> 
> Any help would be much appreciated! Thanks.
> 
> -Ivan
> 
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