[Gdal-dev] OGR:GetNextFeature() throws exception in WINXP
mateusz at loskot.net
Mon Mar 20 07:30:23 EST 2006
Vidhiyadharan Nadarajah wrote:
> Iam a begineer in this field. I have been using OGR for the past 6 months.
> I have built a windows application (using VC++) which is runing perfectly
> fine in WIN2K.
> I have built this application based on the sample provided in the OGR
> Tutorial (http://gdal.maptools.org/ogr/ogr_apitut.html). Reading a point
> layer is alone described in the tutorial and i have added some code for
> reading the polygon layer.
> My problem is the same application crashes in WinXP. The function
> "poLayer->GetNextFeature()" throws an exception in winXP.Iam unable to find
> the exact exception.
> I have compiled GDAL1.3.0 and PROJ4 and linking the DLL in my application.
> Please find below the piece of code that Iam using. Please help me to find
> out the mistake that Iam doing. I can also send the VC++ workspace and the
> shape file, if it is needed for finding out the problem.
> #include "stdafx.h"
> #include "ogrsf_frmts.h"
> int main()
> OGRDataSource *poDS;
> poDS = OGRSFDriverRegistrar::Open( "C:\ind.shp", FALSE );
> if( poDS == NULL )
> printf( "Open failed.\n%s" );
> exit( 1 );
> OGRLayer *poLayer;
> poLayer = poDS->GetLayerByName( "india_ds" );
I'd supose here you are getting null pointer.
Add simple test if poLayer is a null pointer:
if (NULL == poLayer)
printf("Layer not found\n");
And you will see if this is a problem.
More information about the Gdal-dev