Hi,

If you are using the serial/wifi debugger then you only need to open the serial monitor. Visual Micro keeps track of which projects were uploaded in debug mode, the serial monitor then uses the same configuration to know if a debug session should be started. Same applies to stop the debugger, disconnecting or closing the serial window stops the debug on the IDE side of things but the mcu will still be sending (or awaiting) debug commands until a Release build is uploaded. When opening/starting the serial monitor some boards reset if the Dtr button is enabled. In those cases you can use the Dtr to control if you want the board to restart or to continue when the serial connects.

For hardware debugging, using "Debug>Attach to Process" instead of a build/upload/debug command will attach to a running mcu. In this case, attaching to a board that does not have a debug build on it, might give a strange or useless debug experience.

Are you sure all the files are rebuilt or maybe it is the deep search scan? Please follow the guide in the yellow box above so that we can see what is happening.

Thanks