Next problem! With Ola loaded as a second molecule with the one residue in our molecular system MS1....opening the atom browser and turning on C and the H atoms gives the following traceback: Exception in Tkinter callback Traceback (most recent call last): File "/usr/local/lib/python2.7/lib-tk/Tkinter.py", line 1410, in __call__ return self.func(*args) File "/usr/local/lib/python2.7/lib-tk/Tkinter.py", line 495, in callit func(*args) File "/usr/local/ccpnmr/ccpnmr2.1/python/ccpnmr/analysis/popups/BrowseAtoms.py", line 1026, in update tipTexts=tipTexts) File "/usr/local/ccpnmr/ccpnmr2.1/python/memops/gui/ScrolledMatrix.py", line 2060, in update self.setGraphMenu() File "/usr/local/ccpnmr/ccpnmr2.1/python/memops/gui/ScrolledMatrix.py", line 470, in setGraphMenu options = self.getGraphMenuOptions() File "/usr/local/ccpnmr/ccpnmr2.1/python/memops/gui/ScrolledMatrix.py", line 520, in getGraphMenuOptions submenu.setMenuItems(items) File "/usr/local/ccpnmr/ccpnmr2.1/python/memops/gui/Menu.py", line 177, in setMenuItems self.deleteMenuItems() File "/usr/local/ccpnmr/ccpnmr2.1/python/memops/gui/Menu.py", line 184, in deleteMenuItems self.delete(0, Tkinter.END) File "/usr/local/ccpnmr/ccpnmr2.1/python/memops/gui/Menu.py", line 226, in delete deleteIndex(ind) File "/usr/local/ccpnmr/ccpnmr2.1/python/memops/gui/Menu.py", line 208, in deleteIndex del self.submenuDict[label] KeyError: 'X: '