Hi, I got another exception to report, below. This seems to be correlated to trying to save the project. Saving did not seem to complete and I could not exit the program (at least it kept popping up the 'Save project?' popup anytime I tried to exit (while giving that error in the background, unnoticed). Interestingly, I did manage to save and exit after I did a 'save as', which worked fine... Patrick PS. Here is the error message: Exception in Tkinter callback Traceback (most recent call last): File "ccpnmr/python2.5/lib/python2.5/lib-tk/Tkinter.py", line 1403, in __call__ return self.func(*args) File "/opt/ccpnmr/ccpnmr2.1/python/ccpnmr/analysis/AnalysisPopup.py", line 1999, in saveProject self.saveFile() File "/opt/ccpnmr/ccpnmr2.1/python/ccpnmr/analysis/AnalysisPopup.py", line 2208, in saveFile self.setPopupsOpen() File "/opt/ccpnmr/ccpnmr2.1/python/ccpnmr/analysis/AnalysisPopup.py", line 2190, in setPopupsOpen if popup.state() == 'normal' and not key.startswith(window_popup_prefix): # bit of a hack File "ccpnmr/python2.5/lib/python2.5/lib-tk/Tkinter.py", line 1594, in wm_state return self.tk.call('wm', 'state', self._w, newstate) TclError: bad window path name ".78196864.192250824"