@s_bach i see. thx, nevertheless. well, as said, the only way to avoid that collision seems to be: put the plugins into the plugin-folder of the main application. while discussing the other part of my problem (see symbolcache-topic) on other forums (the german c4dnetwork, that is), it became apparent, that other ppl also do have those collision-messages with r20 - and they, too, do not experience those plugins to be not working. if at any time this "problem" should become of interest for you, let me know, if there's something that i could do/deliver/add any detail, to support you in your efforts. cheers, mesut.