I am trying to obtain a clipping of a contour map into a polygon by using the command
Vector-> Geoprocessing tools -> Clip
in QGIS 2.18.13 freshly installed on Ubuntu 14.04. I run the command on a contour lines layer whose files are within a directory since it is a DXF file (to be imported to autocad) and a shapefile (a polygon basically)
But when I run the command I get the message:
"NameError: global name 'features' is not defined"
Is this error due to some coding glitch in the new release? What is the global name Features referring to?