I have installed a 0.6mm nozzle in the left side, initiated a nozzle read, it got recognized. In Bambu Studio it shows up correctly, I want to calibrate the filament, like I always do, but I get this error message saying “The currently selected nozzle type of left extruder does not match the actual printer nozzle type. Please click the Sync button above and restart the calibration” I click the button, nothing happens, It is displayed correctly anyway below the button as 0.6mm on the left and 0.4mm on the right side. Restarte everything, does not work. Anybody has a clue what I do wrong?
By the way, if I select the right nozzle Calibration works, but not for the left one.
When I select the automatic calibration in the calibration tab, I get the same error.
You might be able to update the right nozzle manually on the printer’s touchscreen to match the left and try again. When you have mixed nozzles installed it does some weird stuff even if you are not calling for the right nozzle.
Thank´s, manually giving the printer a wrong nozzle info did the trick 
They really should fix those Bugs.
Your welcome. They claim the do not support different nozzles in the printer but maybe once they do it will get fixed.
I thought they ment they do not support printing with 2 different nozzle at the same time and not that you cannot use it in single nozzle mode without manually having to change nozzles between prints. I would at least like to have the convenience to have 2 different nozzles installed and I just choose the best one for the job on hand. I rarely use multicolor or multi material. Same with the Ams systems, just so convenient to not to have to run to the printer in another room to change filament by hand.
You can do it like you mentioned but I find the calibration to be an issue like you did.