Whenever i look at disable / enable background processing in ArcMap due to unlimited bugs and errors of ArcMap, ESRI referred their documents which you need to click the button in geoprocessing options.
However, I authored a program and i need to copy features as using "Feature Class to Feature Class tool" from an SDE workspace into filegdb. When i want to do that in Python console in ArcMap or ArcToolbox it gives me error if i enable Background processing. If i disable, no error occurs.
The main problem is there is no access in arcpy to disable background process or i could not find.
But the most ridiculous thing in this process, Feature class to feature class is very basic tool. Even in that tool, geoprocess crashes.
I prepared a video for this, you can watch.