Dear all, The script below has been validated for me by the Chimera team sometimes ago. In fact this script does not work each time I run it: When reaching the pdb dockSL0007.pdb, or dockSL0010.pdb, or dockSL0020.pdb,... Chimera can remained fixed on the current PDB file as if it faces problem to open it. I'm forced to close Chimera which does not respond anymore. The exit code is 805306369. I attached dockSL0009.pdb and dockSL0010.pdb. What can I do to report this bug (which may be due to something external to Chimera; my Chimera version is 1.5.2 Build 32411; my plateform is Windows 7 64 bits) since I have to brutally stop Chimera, and know more about this problem? Many thanks for your help Damien from chimera import runCommand as rc #from chimera.tkgui import saveReplyLog for i in range(1, 101): rc(r"open C:\Program Files (x86)\Hex 6.3\examples\New Hex run_SL_250211\FirstRun_S_Ldimer\dockSL%04d.pdb" % i) rc("distance :246.C@CB :297.A@CB") rc("distance :246.C@CB :297.B@CB") rc("close all") #rc("saveReplyLog('replyLog%04d.txt')" % i)