Hi Nathan, OK - even more strange. This string does not appear in my project file at all. I checked in a text editor and grepped to be absolutely sure.
On 11 October 2011 14:20, Nathan Woodrow <[email protected]> wrote: > Can you search the xml in the project file for VectorBackgroundMapMarch2011 > and post each line it is mentioned on. The only time QGIS will throw the > Data Source is invaild error is in the ogr provider and somehow it is trying > to load your project as a layer which it then bombs on. > > - Nathan > > On Tue, Oct 11, 2011 at 11:10 PM, Nathan Woodrow <[email protected]>wrote: > >> Very strange indeed. >> >> - Nathan >> >> >> On Tue, Oct 11, 2011 at 10:59 PM, Purves Ross <[email protected]>wrote: >> >>> OK, thanks for the tip re file number! Fingers crossed it's not that >>> though. >>> >>> Sorry - now I get you. You mean can I load the layer called >>> 'VectorBackgroundMapMarch2011' in its own right into a fresh project, right? >>> Here's the rub - and also why I was confused by your question - there's no >>> apparent layer with that name in the project! That's the name of the overall >>> .qgs file, not a layer within it. Seems strange? >>> >>> Many thanks! >>> Ross >>> >>> >>> >>> >>> On 11 October 2011 13:53, Nathan Woodrow <[email protected]> wrote: >>> >>>> I recall hearing about a bug where layers fail to load if there is a >>>> certain number of files in the project but this might be something >>>> unrelated. >>>> >>>> I mean can you load >>>> /mnt/bunker/ross/Research/PhD/NewMapMarch2011/VectorBackgroundMapMarch2011 >>>> in QGIS on it's own in a fresh project. >>>> >>>> - Nathan >>>> >>>> On Tue, Oct 11, 2011 at 10:51 PM, Purves Ross <[email protected]>wrote: >>>> >>>>> Hi Nathan, >>>>> >>>>> OK - by counting the number of occurances of '<maplayer' in the project >>>>> file, I count 50 layers. Sounds a lot but there were no problems in 1.6 >>>>> with >>>>> this number! >>>>> >>>>> Sorry to be stupid, not sure what you mean by load the file by itself. >>>>> Are you saying that there is a way of selectively loading layers on >>>>> opening >>>>> a QGIS project file? Or do you mean opening the file in a text editor or >>>>> something. If the latter, then it certainly loads the XML OK and there's >>>>> no >>>>> evidence that the file is corrupted. >>>>> >>>>> Thanks again for the help! >>>>> Cheers >>>>> Ross >>>>> >>>>> >>>>> On 11 October 2011 13:44, Nathan Woodrow <[email protected]> wrote: >>>>> >>>>>> How many layers do you have in this project file? And can you load >>>>>> the file by itself? >>>>>> >>>>>> - Nathan >>>>>> >>>>>> >>>>>> On Tue, Oct 11, 2011 at 10:35 PM, Ross Purves <[email protected]>wrote: >>>>>> >>>>>>> Hi Nathan, >>>>>>> >>>>>>> Very many thanks for the quick response! OK, running from the command >>>>>>> line gives me slight more info, to be sure: >>>>>>> >>>>>>> [Tue Oct 11 13:34:26 RMPT43:NewMapMarch2011 ]$ qgis >>>>>>> VectorBackgroundMapMarch2011 >>>>>>> Warning: loading of qgis translation failed >>>>>>> [/usr/share/qgis/i18n//qgis_en_GB] >>>>>>> Warning: loading of qt translation failed >>>>>>> [/usr/share/qt4/translations/qt_en_GB] >>>>>>> Warning: Couldn't load Python support library: Cannot load library >>>>>>> /usr/lib/qgispython: (/usr/lib/libqgispython.so: cannot open shared >>>>>>> object >>>>>>> file: No such file or directory) >>>>>>> Critical: Data source is invalid >>>>>>> Critical: >>>>>>> >>>>>>> Additionally, when I start QGIS this way I get a pop up window within >>>>>>> the graphical interface that says: >>>>>>> >>>>>>> The layer >>>>>>> /mnt/bunker/ross/Research/PhD/NewMapMarch2011/VectorBackgroundMapMarch2011 >>>>>>> is not a valid layer and can not be added to the map >>>>>>> >>>>>>> The strange thing is that I'm pretty certain there is no problem with >>>>>>> the project file. It's timestamp reads 22 April, when I last worked on >>>>>>> it. >>>>>>> I.e. the version of QGIS has changed but my file has remained constant. >>>>>>> >>>>>>> Many thanks! >>>>>>> Ross >>>>>>> ________________________________________ >>>>>>> From: Nathan Woodrow [[email protected]] >>>>>>> Sent: 11 October 2011 13:26 >>>>>>> To: Purves Ross >>>>>>> Cc: [email protected] >>>>>>> Subject: Re: [Qgis-user] QGIS 1.6 project causing 1.7 to crash >>>>>>> >>>>>>> Hi Ross, >>>>>>> >>>>>>> That sounds a bit strange. Can you start QGIS from the terminal and >>>>>>> see what the output is when it locks up. >>>>>>> >>>>>>> - Nathan >>>>>>> >>>>>>> On Tue, Oct 11, 2011 at 10:19 PM, Purves Ross <[email protected] >>>>>>> <mailto:[email protected]>> wrote: >>>>>>> Hi there, >>>>>>> >>>>>>> I've updated my Ubuntu 10.10 installation to use QGIS 1.7. I put a >>>>>>> lot of work into a project using QGIS 1.6 but it won't open in 1.7. The >>>>>>> layers all appear but then the screen freezes as though QGIS is >>>>>>> rendering >>>>>>> the resulting map forever. >>>>>>> >>>>>>> A bit of googling revealed that there was a bug at some point which >>>>>>> required the placement of 'gdal' between all <provider></provider> tags >>>>>>> in >>>>>>> the project XML file in a scenario like this. However, I tried this and >>>>>>> it >>>>>>> didn't work. I also have read various posts that say the use of 'on the >>>>>>> fly' >>>>>>> project appeared to cause problems going between 1.6 and 1.7. The >>>>>>> project in >>>>>>> question does indeed use on the fly projection. >>>>>>> >>>>>>> As a final note, I have an ECW raster layer in this map that requires >>>>>>> the modified GDAL to work. I thought that the crash might be to do with >>>>>>> the >>>>>>> upgrade having removed my modified version of GDAL. I therefore >>>>>>> recompiled >>>>>>> it all and have checked to see that my version of 1.7 can now read ECW >>>>>>> files >>>>>>> and it can (when they are presented a a fresh layer and not as part of >>>>>>> the >>>>>>> problematic project). >>>>>>> >>>>>>> This is a really, really important project to me and I do need to get >>>>>>> it back if at all possible. Please can anyone help? >>>>>>> >>>>>>> Very many thanks! >>>>>>> Ross Purves >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Qgis-user mailing list >>>>>>> [email protected]<mailto:[email protected]> >>>>>>> http://lists.osgeo.org/mailman/listinfo/qgis-user >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >
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