Hello Tom, I am using EMAN and Chimera for the first time. I have installed Chimera version 1.3 and EMAN 1.8. I've tried to use the ssehunter extension in Chimera but it does not allow me to select the .mrc file and if I press apply, I get this message. <type 'exceptions.UnboundLocalError'> Exception in Tk callback Function: <function command at 0x4317156c> (type: <type 'function'>) Args: () Traceback (innermost last): File "CHIMERA/lib/python2.5/site-packages/Pmw/Pmw_1_3/lib/PmwBase.py", line 1747, in __call__ None File "CHIMERA/share/chimera/baseDialog.py", line 244, in command None File "/users/fern/software/EMAN/chimeraext/Airs/ssehunter.py", line 89, in Apply targetPath=airsIO.getPath(target) File "/users/fern/software/EMAN/chimeraext/Airs/airsIO.py", line 62, in getPath return path <type 'exceptions.UnboundLocalError'>: local variable 'path' referenced before assignment Am I missing some dependencies? I assume this extension will only work if you can select an .mrc file? On another note, how long does foldhunter usually take? I have been running it for over a day now. I am using a rather large map (256x256x256), but my atomic structure is rather small compared to the map (about 4% of the entire map) Any help would be welcome, Fernando