[gdal-dev] OGR_G_ExportToWkt make MEX crash

[Joaquim Luis]

Hi,

I wrote a OGR C MEX wrapper to use in Matlab which already works in many 
cases.
However, I had a situation when trying to fetch the reference info. The 
chunk of code below now works, but if I use the commented line that calls
OGR_G_ExportToWkt
than Matlab crashes at that line. However, using the OSRExportTo... 
functions works fine.
I'm I doing something forbidden or ...

heers

Joaquim

     hSRS = OGR_L_GetSpatialRef(hLayer);    /* Do not free it later */
         if (hSRS) {
             char    *pszWKT = NULL, *pszProj4 = NULL;
             mxArray    *mxPrjRef;

             /*OGR_G_ExportToWkt (hSRS, &pszWKT); */ <======     THIS 
CALL MAKE THE MEX CRASH

             if (OSRExportToProj4(hSRS, &pszProj4) == OGRERR_NONE) {
                 mxPrjRef = mxCreateString (pszProj4);
                 mxSetField (out_struct, 0, "SRSProj4", mxPrjRef);
             }
             if (OSRExportToPrettyWkt(hSRS, &pszWKT, 1) == OGRERR_NONE) {
                 mxPrjRef = mxCreateString (pszWKT);
                 mxSetField (out_struct, 0, "SRSWkt", mxPrjRef);
             }
         }