CALCULATE SUM OF POLYLINE LENGTH

LPL

The Command LPL will work for LINE, SPLINE, LWPOLYLINE, POLYLINE, ARC, CIRCLE, ELLIPSE so you are fully covered  

just download the file and load it with APPLOAD command and type : LPL in the command line to start the program

DOWNLOAD LINK: http://www.kimprojects.com/wp-content/uploads/2015/04/LPL-Sum-polyline-length.rar