lyx file from 2015 not converted to pdf

[Pavel Sanda]

On Tue, Mar 24, 2020 at 07:21:27PM +0100, Wolfgang Engelmann wrote:
> LyX: Software exception Detected
> LyX has caught an exception, it will now attempt to save all unsaved
> documents and exit.
> Exception: std::exception
> 
> Did I understand you correctly, that you did not receive this message?

No, but you might have assertions enabled.
Did you self compile or do you use distribution binary?

Pavel