Hi Listers
I've created a toolbutton and set its event handler, thus, (I've spared you the rest): Create ButtonPad "Stops" As . ToolButton HelpMsg "Click this to enable the identification of Bus Stops along a Route\nSelect a Route's Bus Stops" Calling PLOT_STOPS_EVENT ID PLOT_STOPS_BUTTON_ID Icon 303 file "mPlanIcons.dll" Cursor MI_ICON_CROSSHAIR DrawMode DM_CUSTOM_POINT Disable PushButton . Title "Stops" Fixed Each time I click it I get: "Internal error: 30901" and get chucked out - no other explanation. Owing to the ridiculous nature of the MB debugger, whereby you can't trace the prog if MI is up (grrrr! - what's the point of that when >90% of MB's usage is in conjunction with MI?), I've had to put "NOTE" breaks in my code to see what happens. As far as I can ascertain, it doesn't even get into the handler. Can anyone please shed any light? TIA Terry McDonnell
