Hi,
May I suggest you all file a bug reports if it has not been done.
This is indeed the third problem reported. The first seemed related to
deleting shapefile geometries (a known problem caused by the fact that the
released file description by ESRI does not explain how to delete geometries,
the second was most likely cause by a wrongly selected snapping option
and now this this.
General recommendations vary from updating QGIS to the latest version,
disabling third party plugins that may cause memory leaks and do things like
slowing down saving file for simple modification (as reported here), to saving
shapefile regularly under different names (which should be done all the time
along with backups of the original data before it is modified) and finally, to
use a more modern file format like spatialite. Spatialite format is
open and apparently very effective. Shapefile, being an old
proprietary format should be used only for last resort file sharing. That
being said, I use it all the time. Call it a bad habit! :)
Nicolas Cadieux M.Sc.
Les Entreprises Archéotec inc. 
8548, rue Saint-Denis Montréal H2P 2H2
Téléphone: 514.381.5112  Fax: 514.381.4995
www.archeotec.ca
On Feb 8, 2016 08:56, "Uwe Fischer [via OSGeo.org]"
<[email protected]> wrote:
Pierre, this is now the third message in this list concerning fatal
errors in editing shapefiles in QGIS within a few weeks (see details below).
Maybe it’s not a consolation to you, but others lost a lot of confidence in
QGIS, too. Looks like there are bugs that are very difficult to remove. It’s a
pity that there is no information on the debugging status. Regards, Uwe
On Feb 2, 2016 8:46 PM, "Springfield Harrison [via OSGeo.org] " <
[hidden email] > wrote: Hello Group, Am using QGIS 2.10.1 and have
done so without significant problems for many months. I am attempting to
create simple polygons in a shapefile by direct vertex entry or copying
polygons from another shapefile layer and pasting them into the active layer.
In almost every case, these features disappear. There is an entity entry
in the attribute table but there are no polygons created. In one case a
polygon was created but it was not the shape that I digitized; no more polygons
could be created although the process for doing so appears to be working. No
error messages were created. The CRS for the project and the shapefile are the
same. The shapefile can be opened in another GIS but has no content.
Here are some product details: QGIS version 2.10.1-Pisa QGIS
code revision d20c5b7 Thanks very much for any help you can render,
Cheers . . . . . . . . Springfield Harrison
_______________________________________________ Qgis-user mailing list Hello
all, today I was working on a shape dataset and I had to delete some
features. Later I opened the shapefile in ArcMap by chance and I found that the
features were not deleted. They still did exist. I repeated the process – and
got the same result. Then, searching the internet, I found this incredible
post: https://hub.qgis.org/issues/11007 It is a well known problem (for 1,5
years!!) that QGIS is not able to delete shapes in a reliable way!! I was
horrified to read this because it is the same as if a Word processor would not
be able to delete a letter from a text. I cannot understand why the QGIS
developers haven’t fix that yet. If QGIS really wants to compete with ArcMap,
they should fix it as soon as possible. At least, the according menu entries or
buttons should be inactivated if they don’t bring out reliable results. My
questions are: · is this information still up to date? I can‘t read all
of the 80 answers to the post now to get in-depth information ... ·
does anybody have information about how they are planning to handle this
problem at the development team? · is there a workaround for this? Do
the GRASS vector tools bring out reliable results? · are there more of
those software errors in QGIS that might lead to huge problems in working on
vector data and sharing them with others? If so, is there a „black list“ of
things one is never allowed to use in QGIS if you don’t want to destroy your
datasets? Von: Qgis-user [mailto: [hidden email] ] Im Auftrag
von Pierre Muckensturm Gesendet: Montag, 8. Februar 2016 14:34 An: [hidden
email] Betreff: [Qgis-user] [QGis 2.10]Error while saving shape file Hi, I
use a QGis 2.10 version, X64 on Windows installed with Osgeo4W. I'll try
to explain the bug. I work on a map, with a shape file of polygons. They are
not really complex, nor numerous (25). I got id, DOSSIER, NOM_OPERAT,
PRIORITE, COMMENTA, DATE_MAJ, SOURCE, LIBELLE_X, LIBELLE_Y fields
and SURF_HA which is a virtual field. Friday, it took me 5 min to save
the file each time I modify a vertex. Today, I update my id field with the
expression "$id". Then, my shape file looks like a totally mess (look
at the imgur album : http://imgur.com/a/noSM2 ). The LIBELLE_X, LIBELLE_Y
fields have disappeard, the DOSSIER field which used to be null is now
partially fulled, the NOM_OPERAT are truncated, fulled in a completelly
non-sense manner. As for PRIORITE, DATE_MAJ. Conclusion, 2 days of work in a
trash. I'm quite pissed off, according with the fact that I'm trying to
convince my superior we shall use QGis. So, what happened ? How could this
happen ? Sorry but I don't have the genuine files, and the data are quite
sensitive. -- PLM _______________________________________________
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