Not so much using to much RAM, more a case of taking hours to find a file and becoming unresponsive while it was searching.

The problem is that Poser files are not native to DS, they have to be loaded in with an import plugin, as a result any syntax errors in the code of the pathway wouldn't be recognized by the plugin and would send DS off into an eternal search loop.

After the devs stopped DS from searching we very quickly found out just how 'bad' the pathways could get, most of us old hands are now well versed in using text editors to 'fix' the poser files, and not just to fix pathways.