command line merge: /home/cadviewer/onlinedemo.cadviewer.com/cadviewer_6_4/converters/dwgmerge2020/windows//DwgMerge2020.exe -base="" -merge="" -out="" -over -lpath="/home/cadviewer/onlinedemo.cadviewer.com/cadviewer_6_4/converters/dwgmerge2020/windows/"  127