How do you run the microflow debugger? I have set a breakpoint within the microflow and after running the microflow via a button in browser on localhost no debugger window ever appears. There is a "show message" activity right after the activity that has the breakpoint set, and that appears as expected. I do not have any conditions set on the breakpoint. running mendix 126.96.36.199
The debugger only works when in development mode.
All other modes (acceptance, test or production) disable the debugger module.
Is the breakpoint enabled? (that is, is the circle fill red, it is white if it is disabled). That should be enough to trigger it if the activity is triggered. (and note that the popup might popup behind your other applications, so try to minimize every other by hand)
And did you redeployed after setting the breakpoints?