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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>> My 3 year old mapping project used 1.8 on Windows 7 prof. to create <o:p></o:p></p><p class=MsoNormal>> some 320 vector and raster layers (about 50/50). It started to crash <o:p></o:p></p><p class=MsoNormal>> rather frequently - but I never lost data or layers. I have now <o:p></o:p></p><p class=MsoNormal>> installed QGIS 2.6 64 bit and find that half the vector layers will <o:p></o:p></p><p class=MsoNormal>> not display and can see no reason for this as there is no difference <o:p></o:p></p><p class=MsoNormal>> that I can see between the layers that display and those that don't. <o:p></o:p></p><p class=MsoNormal>> If I open the project in version 1.8 now, I find that the same vector <o:p></o:p></p><p class=MsoNormal>> layers are missing. Any ideas on how to fix this?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I had a similar problem recently with some downloaded boundary data shapefiles which wouldn’t display properly in QGIS 2.2 or 2.4 on Windows 7 Professional 64x – some layers didn’t display at all, others had missing polygons. The data provider suggested I create a spatial index (under layer properties – general) and it solved the issue. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kevin Honour<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>