Can't write buffer 'fp-info-cache' to disk

[Simon Richter]

I just tested pcbnew standalone on MSVC, and after closing, got an error dialog that it failed to write the fp-info-cache to disk.

I suspect that is because of the missing project context, so this might be doing something that appears to work on Linux, like write to the current directory, which on Windows happens to be the read-only application directory.

[Nick Østergaard (nickoe)]

Isn't this because it writes to a readonly location?

[Michael Kavanagh (michaelkavanagh)]

Is there anything to fix here? I only get that message when the project/PCB file is in a read only directory (e.g. demo projects) and therefore is desired behaviour.

[Simon Richter (sjr)]

I also get that when I start pcbnew directly, without opening a project.

[Wayne Stambaugh (stambaughw)]

@Jeff, is there any downside other than loading speed in saving the fp-info-cache file to a temporary folder when the user doesn't have write privileges to the current folder? It would be a bit less intrusive than the error message.

[Jeff Young (jeyjey)]

@Wayne, I think that would be fine. It wouldn't travel with the project if you moved it, but that's no big deal as it will just get auto-regenerated.

[Phillip Graham (ptransubuntu)]

Minor point related to this. On windows 8 and 10 if you open pcbnew and then close it without creating a project, you get the footprint cache write error on close. This doesn't happen if you create a project in and save it in a (writeable) location.

[KiCad Janitor (kicad-janitor)]

KiCad bug tracker has moved to Gitlab. This report is now available here: https://gitlab.com/kicad/code/kicad/-/issues/1890