Post #1156: 
Leafar:
Want to add and share a line of code to save + 1 but this line does not work for me for saving with increment, why??
bpy.ops.file.filenum(‘EXEC_DEFAULT’, increment=1)
Hi, looks like this command works only in Blender’s file browser.
You can write some custom script to save the file using bpy.ops.wm.save_as_mainfile(filepath=‘…’) and bpy.data.filepath