Silent fillament scanning failure

Although not critical, I noticed that the AMS fillament scanning silently fails if there is an external pool loaded, which makes sense as the fillament can’t be fed through. However, when you are busy changing a lot of stuff, it takes a while to realise whats wrong.

It would be great to have at least a message displayed mentioning that scanning can’t be done at the moment becauce there is already a fillament loaded.

Did you follow the rule of the minimum of 600mm for the PTFE tube between the AMS and the 4-in-1 ?