I have just install fsleyes on my Ubuntu 16.04 OS. I am not able to make lightbox visualization. The fsleyes is writing following log: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/fsleyes/actions/base.py", line 128, in __call__ return self.__func(*args, **kwargs) File "/usr/lib/python2.7/dist-packages/fsleyes/actions/frameactions.py", line 38, in addLightBoxPanel addViewPanel(self, LightBoxPanel) File "/usr/lib/python2.7/dist-packages/fsleyes/actions/frameactions.py", line 23, in addViewPanel vp = self.addViewPanel(vpType, **kwargs) File "/usr/lib/python2.7/dist-packages/fsleyes/frame.py", line 475, in addViewPanel self.__addViewPanelMenu( panel, title) File "/usr/lib/python2.7/dist-packages/fsleyes/frame.py", line 687, in __addViewPanelMenu self.__refreshToolsMenu() File "/usr/lib/python2.7/dist-packages/fsleyes/frame.py", line 1605, in __refreshToolsMenu menu.Remove(item) File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_core.py", line 12089, in Remove return _core_.Menu_Remove(*args, **kwargs) TypeError: in method 'Menu_Remove', expected argument 2 of type 'int' ** (fsleyes:13977): CRITICAL **: murrine_style_draw_box: assertion 'height >= -1' failed ** (fsleyes:13977): CRITICAL **: murrine_style_draw_box: assertion 'height >= -1' failed ** (fsleyes:13977): CRITICAL **: murrine_style_draw_box: assertion 'height >= -1' failed The error is writing something about value types, that it expects integers. My F-maps are possibly in float32 format. Please any idea? Rene Labounek