I was just trying to transfer some banks from my E5000 Ultra to my E4K and was unable to load them into the E4K due to the presence of sequences (which I didn't need anyway).
When I deleted the sequences and re-saved the bank it saved as an E4R bank which is not recognised by the E4K.
I rather stupidly re-saved this over the original bank.
Any ideas as to how I can make it readable by the E4K (it still loads into the E5000 fine)?