toxictroop This one is tricky... I have a few ideas what can cause the error. The most likely thing is a bug or similar on your server in combination of the POC design of the plugin. It basicly says that there is no Map with ID 0... I uploaded a new version which tries to fix/track the bug. Please tell me if it works or if you still get an error. DL: http://www.craftlancer.de/Plugins/ServerMinimap.jar
The fast sending of the map is only activated when you have the permission "minimap.fastupdate", otherwise it uses the vanilla map sending, which is pretty slow (5-6 seconds for a full map). Also the plugin needs to calculate new regions first, which may takes a while.
