I have big file (500 Mbytes) generated with MMQGIS merge from files.
When loading I get this message :
Invalid spatial index. Index of shape is outside bounds.
Ok that's likely possible. But how can I recalculate the spatial index ? I don't see this tool in MW.
When you open the properties of the layer (double click in legend) you'll get this window which has the option to create a spatial index:
Is this what you where looking for?
I tried to check/uncheck this but nothing happen, even after apply, ok... I was searching for tool like in Qgis or Arcgis "build spatial index"