I have run a large spatial point to polygon join of 2 million points to 657 polygons. I used NNJoin so that the closest polygon will be assigned to a point if the point does not lie within one. The process ran for around 6 hours. The status bar showed 100%, but no 'finished' message or result output file was added to QGIS or can be found in my directory. If I close the status bar on QGIS, I get a Python error "RuntimeError: wrapped C/C++ object of type QProgressBar has been deleted. Any ideas what the problem is?