Hi,<br><br>I think Analysis is making some math errors somewhere.&nbsp; I can&#39;t speak for protein assignments, but in the case of RNAs whenever I try to assign a resonance (this seems to happen for every cross-peak) analysis warns me that that assignment is unlikely to be at this chemical shift.&nbsp; I checked in both the BMRB and in the NmrRefChemicalShift popup and the assignment is legitimate.&nbsp;&nbsp; Also&nbsp; I&#39;ve used analysis to make these assignments before in another project and I didn&#39;t get any error messages.&nbsp; 
<br><br>Thanks,<br><br>Justin<br>