Maybe this question has been asked many times before. I could not find the thread, sorry for that. My question is: When there is a message pop window shows up with the message, "Atom XX X .. .. already assigned to another resonance with a different shift Y at ..... ppm", Now if there are slight changes in the chemical shifts between the samples, analysis will not allow someone to assign through the assignment panel. Is there a way for user defined assignment, that can override any such Failure messages ?