Hi, Selecting the short form crosspeak annotations in Edit Peak Draw Parameters gives me: Exception in Tkinter callback Traceback (most recent call last): File "/usr/lib64/python2.2/lib-tk/Tkinter.py", line 1316, in __call__ return apply(self.func, args) File "/usr/local/ccpnmr/ccpnmr1.0/python/memops/gui/CheckButton.py", line 65, in doCallback self.callback(self.getSelected()) File "/usr/local/ccpnmr/ccpnmr1.0/python/ccpnmr/analysis/EditPeakDrawParamsPopup.py", line 261, in setSimpleAnnotations code1Letter = residue.molResidue.chemCompVar.code1Letter or 'X' AttributeError: 'ChemCompVar' object has no attribute 'code1Letter' -- Dr. Brian O. Smith ---------------------- B.Smith at bio.gla.ac.uk Division of Biochemistry & Molecular Biology, Institute Biomedical & Life Sciences, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, UK. Tel: 0141 330 5167/6459 Fax: 0141 330 8640