[Qgis-developer] Warning - shapefile corruption on 2.16/master and how to recover

[Luca Lanteri]

I've encountered the same problem when i try to split some polygons.

I don't really understand what was the problem, just some hint:

- it occours only on windows. The same shapefile works fine on Linux.
- it also affects qgis 2.14
- is not connected with topology error. The problem remain also after using
v.clean.

I hope this could be useful
Luca
Il 16/Set/2016 03:08, "Nyall Dawson" <nyall.dawson at gmail.com> ha scritto:

> Unfortunately a fairly nasty regression has slipped in to 2.16 and is
> still present on master. This results in shapefile corruption in
> certain circumstances.
>
> While I've hit this issue maybe 3 or 4 times in the last 2 months, I
> haven't been able to track down exactly what causes this. It seems
> related to using the split or reshape tool on a shapefile, then saving
> the changes and getting the errors "Cannot reopen datasource
> xxx.shp|layerid=0 in read-only mode" and "Data source is invalid
> (Unable to open xxx.shx or xxx.SHX.Try --config SHAPE_RESTORE_SHX true
> to restore or create it)" in the log.
>
> A full report is at http://hub.qgis.org/issues/15570
>
> Hopefully we can resolve this before the next round of releases. In
> the meantime, there's a workaround for recovering data:
>
> In the same folder as the shapefile there'll be additional files
> "xxx_packed.shp" and "xxx_packed.shx". Renaming the "xxx_packed.shx"
> file to "xxx.shx" allows the original shapefile to be reopened.
>
> Nyall
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