<p dir="ltr">Hi,<br>
May I suggest you all file a bug reports if it has not been done.</p>
<p dir="ltr">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. </p>
<p dir="ltr">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! :)</p>
<p dir="ltr">Nicolas Cadieux M.Sc.<br>
Les Entreprises Archéotec inc. <br>
8548, rue Saint-Denis Montréal H2P 2H2<br>
Téléphone: 514.381.5112 Fax: 514.381.4995<br>
www.archeotec.ca</p>
<div class="gmail_quote">On Feb 8, 2016 08:56, "Uwe Fischer [via OSGeo.org]" <<a href="/user/SendEmail.jtp?type=node&node=5249487&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> wrote:<br type='attribution'><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;color:#1f4e79">Pierre,</span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;color:#1f4e79"> </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;color:#1f4e79">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.</span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;color:#1f4e79"> </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;color:#1f4e79">Regards,</span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;color:#1f4e79"> </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;font-variant:small-caps;color:#1f4e79">Uwe </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;font-variant:small-caps;color:#1f4e79"> </span></p><p>On Feb 2, 2016 8:46 PM, "Springfield Harrison [via OSGeo.org] " <<a href="http://user/SendEmail.jtp?type=node&node=5248593&i=0">[hidden email]</a>> wrote:</p><p>Hello Group,<br /><br /> 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.<br /><br /> 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.<br /><br /> The shapefile can be opened in another GIS but has no content.<br /> <br /> Here are some product details: QGIS version 2.10.1-Pisa QGIS code revision <a href="https://github.com/qgis/QGIS/commit/d20c5b7" target="_top" rel="nofollow" link="external">d20c5b7</a><br /><br /> Thanks very much for any help you can render, Cheers . . . . . . . . Springfield Harrison<br /><br />_______________________________________________ <br />Qgis-user mailing list <br /><br /><span style="font-size:11pt;font-family:'verdana' , sans-serif;font-variant:small-caps;color:#1f4e79"></span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;font-variant:small-caps;color:#1f4e79"> </span></p><p><span style="font-family:'verdana' , sans-serif">Hello all,</span><span style="font-size:11pt;font-family:'verdana' , sans-serif"></span></p><p><span style="font-family:'verdana' , sans-serif"> </span></p><p><span style="font-family:'verdana' , sans-serif">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: <a href="https://hub.qgis.org/issues/11007" target="_top" rel="nofollow" link="external">https://hub.qgis.org/issues/11007</a></span></p><p><span style="font-family:'verdana' , sans-serif"> </span></p><p><span style="font-family:'verdana' , sans-serif">It is a well known problem (for 1,5 years!!) that <i><u>QGIS is not able to delete shapes in a reliable way</u></i>!! 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.</span></p><p><span style="font-family:'verdana' , sans-serif"> </span></p><p><span style="font-family:'verdana' , sans-serif">My questions are:</span></p><p style="text-indent:-18pt"><span style="font-family:'symbol'">·<span style="font:7pt 'times new roman'"> </span></span><span style="font-family:'verdana' , sans-serif">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 ...</span></p><p style="text-indent:-18pt"><span style="font-family:'symbol'">·<span style="font:7pt 'times new roman'"> </span></span><span style="font-family:'verdana' , sans-serif">does anybody have information about how they are planning to handle this problem at the development team?</span></p><p style="text-indent:-18pt"><span style="font-family:'symbol'">·<span style="font:7pt 'times new roman'"> </span></span><span style="font-family:'verdana' , sans-serif">is there a workaround for this? Do the GRASS vector tools bring out reliable results?</span></p><p style="text-indent:-18pt"><span style="font-family:'symbol'">·<span style="font:7pt 'times new roman'"> </span></span><span style="font-family:'verdana' , sans-serif">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?</span></p><p><span style="font-family:'verdana' , sans-serif"> </span></p><p><span style="font-family:'verdana' , sans-serif"> </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;font-variant:small-caps;color:#1f4e79"> </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;font-variant:small-caps;color:#1f4e79"> </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;font-variant:small-caps;color:#1f4e79"> </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;font-variant:small-caps;color:#1f4e79"> </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;font-variant:small-caps;color:#1f4e79"> </span></p><p><span style="font-size:11pt;font-family:'verdana' , sans-serif;color:#1f4e79"> </span></p><p><b><span style="font-size:11pt;font-family:'calibri' , sans-serif">Von:</span></b><span style="font-size:11pt;font-family:'calibri' , sans-serif"> Qgis-user [mailto:<a href="/user/SendEmail.jtp?type=node&node=5249473&i=0">[hidden email]</a>] <b>Im Auftrag von </b>Pierre Muckensturm<br /><b>Gesendet:</b> Montag, 8. Februar 2016 14:34<br /><b>An:</b> <a href="/user/SendEmail.jtp?type=node&node=5249473&i=1">[hidden email]</a><br /><b>Betreff:</b> [Qgis-user] [QGis 2.10]Error while saving shape file</span></p><p> </p><div><div><div><div><div><div><div><p style="margin-bottom:12pt">Hi,</p></div><p style="margin-bottom:12pt">I use a QGis 2.10 version, X64 on Windows installed with Osgeo4W.</p></div><p style="margin-bottom:12pt">I'll try to explain the bug. </p></div><p style="margin-bottom:12pt">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.</p></div><div><p>Friday, it took me 5 min to save the file each time I modify a vertex.</p></div><div><p> </p></div><p style="margin-bottom:12pt">Today, I update my id field with the expression "$id". Then, my shape file looks like a totally mess (look at the imgur album : <a href="http://imgur.com/a/noSM2" target="_top" rel="nofollow" link="external">http://imgur.com/a/noSM2</a>). 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. </p></div><p style="margin-bottom:12pt">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.</p></div><p style="margin-bottom:12pt">So, what happened ? How could this happen ? Sorry but I don't have the genuine files, and the data are quite sensitive.<br /><br /></p><div><div><div><div><div><div><div><div><p>-- </p><div><p>PLM</p></div></div></div></div></div></div></div></div></div></div></div><br />_______________________________________________
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