Hi, Couldn't remember whether Link Seq Spin Systems is supposed to work with a target window that posesses horizontal separators? I'm getting the traceback below. >>> Exception in Tkinter callback Traceback (most recent call last): File "/usr/lib/python2.4/lib-tk/Tkinter.py", line 1345, in __call__ return self.func(*args) File "/usr/local/ccpnmr/ccpnmr1.0/python/memops/gui/ScrolledMatrix.py", line 6 59, in mouseClick self.selectCell(row,col) File "/usr/local/ccpnmr/ccpnmr1.0/python/memops/gui/ScrolledMatrix.py", line 1 688, in selectCell self.callback(self.currentObject, objRow,objCol) File "/usr/local/ccpnmr/ccpnmr1.0/python/ccpnmr/analysis/LinkSeqSpinSystemsPop up.py", line 1290, in selectSpinSystem self.findMatches() File "/usr/local/ccpnmr/ccpnmr1.0/python/ccpnmr/analysis/LinkSeqSpinSystemsPop up.py", line 991, in findMatches self.updateMatches() File "/usr/local/ccpnmr/ccpnmr1.0/python/ccpnmr/analysis/LinkSeqSpinSystemsPop up.py", line 794, in updateMatches displayStrips(self.guiParent, positions, orthoPositions=None, spectrum=None, window=self.matchWindow) File "/usr/local/ccpnmr/ccpnmr1.0/python/ccpnmr/analysis/WindowBasic.py", line 1745, in displayStrips popup.deleteRow() File "/usr/local/ccpnmr/ccpnmr1.0/python/ccpnmr/analysis/WindowPopup.py", line 4996, in deleteRow self.scrolled_window.deleteRow(row) File "/usr/local/ccpnmr/ccpnmr1.0/python/memops/gui/ScrolledWindow.py", line 1 967, in deleteRow rects = self.corner_canvas.view_rects[row] IndexError: list index out of range