Imagine you have really a lot of open paths. Some of those have overlapping anchor points while others don't have. Is it possible to simply select all the paths and run a command to join only those which have overlapping anchor points?
There is a free script doing that "Merge Overlapped Anchors" and you can find it at shspage.com
merges nearly overlapped anchor points. also reports how many anchor points had been reduced.
just select the path(es) and run the script.