The ARX application PLJOIN.ARX adds a command PLJOIN, which allow R14
lightweight polylines to be joined. PLJOIN will NOT join older R13
style polylines nor will it turn lines into polylines to be joined.
PLJOIN adds the ability to join R14 lightweight polylines that do not
exactly meet at their endpoints. PLJOIN allows you to select polylines
and then specify a "Fuzz join factor". All light weight polylines with
endpoints that fall within the "Fuzz join factor" will be joined.
The default fuzz factor is calculated based on your selection set and
is a "safe" number to use. If this does not give the desired results
try a larger value. Keep in mind that the further you get from the
default value, the more possibilities become available and you may get
results that you did not anticipate. If you know the distance between
endpoints you can enter this as the fuzz factor.