Am I supposed to put in a manual filament change code?  I don't see how because the change is not at a layer boundary.  I have attached a pic of the extruder/filament list.  The print is just a bit too big to print as one unit so I had to break it into 2 parts and each letter became a part.  I merged them back together (I think).

Thanks for any help.

Need some help - I struggle to print anything larger than about 100x100 without the corners warping off the print bed - see pics example.

I get this in PLA, PETG, ASA, PC.  I used to get it with the MK4s - then upgraded to Core One and it still happens.

I've tried Brim of various types, slightly changing the print bed temp (5 deg higher).

It seems to get worse with higher fill-rates.

Any suggestions really appreciated.

I contacted support through live chat and I was asked to disconnect the door sensor and restart the printer again, I did this and I got the whole range of options as normal but it was for the mk4 and not the core one, I was then asked to update the mk4 firmware but as the old mk4 was up to date this didn't do anything, I was then asked to do some of the various reset options which I did but none of them worked. By this time I decided that I was getting nowhere and ended the chat.

So now I have a core one printer that thinks it is a mk4, complete with mk4 firmware. So could someone please tell me how to get rid of the mk4 firmware and load the core one firmware to get this costly pile of parts up and running.

its Connected to the wifi 2.4  ghz network 

so is my iPhone 

but it will never t connect 

I loved my prusa . 
but is nightmare 

how can I fix this 

I’m living  in Zuid Holland

please help me