Clip slot is sometimes undefined

[nassim]

Hello everyone,

I've been fiddling with Max 4 Live to make a looper/resampler
The idea is to be able to use to recorded loop as a source material so that the effect chain can be used as many times as wanted, one modification at the time; Once the recording is done, the recorded loop replaces the current source loop and the effects are reset so that they aren't applied twice

It's pretty hard to explain, if you've seen Tim Exile's live performances then you know exactly what I'm talking about.
You can watch this short video to see the Max device in action : https://youtu.be/Z5rLokHia1I

My problem is that every once in a while, I'll get an error telling me that the clip slot is undefined. That is strange because the action is triggered by an event listener on this very clip, watching for a clip to finish recording. You can see on the picture that the next error is that the clip cannot be copied while it's recording, which is inconsistent with the previous error message that didn't find the clip.

Here is the ableton project and max device containing it: https://www.sendspace.com/file/pxicfq
And the error :


Thanks for the help !

[chapelier fou]

Please first freeze the M4L device then save it.
Then collect and save the project and share it.

[nassim]

I've updated the post with the following link: https://www.sendspace.com/file/pxicfq
Thanks for the help

[nassim]

Your header says that clip slot is sometimes undefined but I don't see that in the error message; note how it's not the API which generates it? Instead it appears that your variable recordingSlot somehow ended up undefined and that's a different ballgame.

Thank you for your answer
The error doesn't come directly from live, but the recordingSlot reference is given to me by Live. I've updated the error image with an explanation that should be much clearer.