I sometimes get the following error window when I start Mach3 "C:\Mach3\lasterr.text  was not found" I use an ethernet  connection  and windows 10. When I have this error I can load a Gcode program and run it but the movement will be  very shocky with big steps  and high sudden start and stop acceleration. Not usefull.  When I restart the complete  PC and CNC machine the error message  dissapears (sometimes a few start ups are needed) and everything works fine. Anybody knows what this is?