When I stop any app, the screen shows the following

Stopping sensorTest
Uncaught exception: TypeError: Cannot convert undefined or null to object
at ChildProcess. (/home/pi/matrix-os/lib/service/manager.js:503:21)
at emitNone (events.js:86:13)
at ChildProcess.emit (events.js:185:7)
at finish (internal/child_process.js:711:14)
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickCallback (internal/process/next_tick.js:98:9) TypeError: Cannot convert undefined or null to object
at ChildProcess. (/home/pi/matrix-os/lib/service/manager.js:503:21)
at emitNone (events.js:86:13)
at ChildProcess.emit (events.js:185:7)
at finish (internal/child_process.js:711:14)
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickCallback (internal/process/next_tick.js:98:9)
UNKNOWN ERROR! TypeError: Cannot convert undefined or null to object
at ChildProcess. (/home/pi/matrix-os/lib/service/manager.js:503:21)
at emitNone (events.js:86:13)
at ChildProcess.emit (events.js:185:7)
at finish (internal/child_process.js:711:14)
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickCallback (internal/process/next_tick.js:98:9)
Unable to clean, exitting…
pi@raspberrypi:~/matrix-os$

I’m having the exact same issue. I’ll let you know if i figure it out

@vincetrujillo If you update your matrix os it should work now.

We made a PR yesterday fixing this. You can just update MOS like @joslingk said. :slight_smile: