Ian,
 
Based on that traceback, it looks like you have two conflicting versions of Tcl (8.4 as well as 8.5) linked against and running in the same process...that could be the source of the crash.
 
Cheers,
Warren

From: Ian Berke [mailto:ian.berke@yale.edu]
Sent: Thursday, September 24, 2009 11:26 AM
To: pymol-users@lists.sourceforge.net
Subject: [PyMOL] Pymol segmentation fault

Hi,

I'm having an issue trying to run various plugins in pymol (apbs and autodock).  Whenever I select a button that should bring up a file browser to choose a file (e.g. "Choose Externally generated pqr" in apbs) Pymol exits with: Segmentation fault (core dumped).  Same thing happens when I go to Help>About.  I can open and save files normally, and just about everything else works.

I've tried this in pymol 1.1r2pre, where I can at least get the apbs plugin window to open, as well as the 1.2 trunk from svn (downloaded and compiled last week) which just crashes when I try to open the apbs window (I can install autodock.py and the window opens, but it crashes when I try to choose the location of files).  I'm guessing this is something to do with the gui and tcl/tk, but don't have any idea how to troubleshoot (see the catchsegv output below).  I'm running Ubuntu 9.10 on x86_64 and have  a GeForce 8400M GS/PCI/SSE2 with the proprietory nvidia driver 185.18.36.

Does anyone have any thoughts?

Here is the backtrace portion from catchsegv:
Backtrace:
/usr/lib/libtcl8.5.so.0[0x7f63977b3eb0]
/usr/lib/libtcl8.5.so.0(Tcl_CreateHashEntry+0x59)[0x7f6397761839]
/usr/lib/libtcl8.4.so.0(Tcl_FindNamespaceVar+0xff)[0x7f6391d8352f]
/usr/lib/libtcl8.4.so.0(TclLookupSimpleVar+0xfb)[0x7f6391d9bf0b]
/usr/lib/libtcl8.4.so.0(TclLookupVar+0xab)[0x7f6391d9b70b]
/usr/lib/libtcl8.4.so.0(Tcl_SetVar2Ex+0x59)[0x7f6391d9c8e9]
/usr/lib/libtcl8.4.so.0(Tcl_SetVar2+0x4f)[0x7f6391d9c80f]
/usr/lib/libBLT.2.4.so.8.4(Blt_Init+0x169)[0x7f6392311859]
/usr/lib/libtcl8.5.so.0[0x7f639777dee6]
/usr/lib/libtcl8.5.so.0[0x7f63977102f1]
/usr/lib/libtcl8.5.so.0[0x7f63977543b8]
/usr/lib/libtcl8.5.so.0(TclObjInterpProcCore+0x110)[0x7f6397796ed0]
/usr/lib/libtcl8.5.so.0[0x7f63977102f1]
/usr/lib/libtcl8.5.so.0[0x7f6397710a5f]
/usr/lib/libtcl8.5.so.0[0x7f63977926d1]
/usr/lib/libtcl8.5.so.0(Tcl_PkgRequireProc+0x9)[0x7f6397792209]
/usr/lib/libtcl8.5.so.0[0x7f6397793192]
/usr/lib/libtcl8.5.so.0[0x7f63977102f1]
/usr/lib/libtcl8.5.so.0(Tcl_EvalObjv+0x43)[0x7f6397710413]
/usr/lib/python2.6/lib-dynload/_tkinter.so[0x7f6398063a32]
/usr/bin/python(PyEval_EvalFrameEx+0x52fd)[0x4a290d]
/usr/bin/python(PyEval_EvalFrameEx+0x5837)[0x4a2e47]
/usr/bin/python(PyEval_EvalFrameEx+0x5837)[0x4a2e47]
/usr/bin/python(PyEval_EvalFrameEx+0x5837)[0x4a2e47]
/usr/bin/python(PyEval_EvalFrameEx+0x5837)[0x4a2e47]
/usr/bin/python(PyEval_EvalCodeEx+0x860)[0x4a40e0]
/usr/bin/python(PyEval_EvalFrameEx+0x4e4f)[0x4a245f]
/usr/bin/python(PyEval_EvalCodeEx+0x860)[0x4a40e0]
/usr/bin/python(PyEval_EvalFrameEx+0x4e4f)[0x4a245f]
/usr/bin/python(PyEval_EvalCodeEx+0x860)[0x4a40e0]
/usr/bin/python[0x52bdf0]
/usr/bin/python(PyObject_Call+0x47)[0x41d6e7]
/usr/bin/python[0x4254ff]
/usr/bin/python(PyObject_Call+0x47)[0x41d6e7]
/usr/bin/python(PyEval_CallObjectWithKeywords+0x43)[0x49c623]
/usr/bin/python[0x49c06f]
/usr/bin/python(PyEval_EvalFrameEx+0x52fd)[0x4a290d]
/usr/bin/python(PyEval_EvalCodeEx+0x860)[0x4a40e0]
/usr/bin/python[0x52bdf0]
/usr/bin/python(PyObject_Call+0x47)[0x41d6e7]
/usr/bin/python[0x4254ff]
/usr/bin/python(PyObject_Call+0x47)[0x41d6e7]
/usr/bin/python(PyEval_CallObjectWithKeywords+0x43)[0x49c623]
/usr/lib/python2.6/lib-dynload/_tkinter.so[0x7f6398061376]
/usr/lib/libtcl8.5.so.0(TclInvokeStringCommand+0x7f)[0x7f639770e80f]
/usr/lib/libtcl8.5.so.0[0x7f63977102f1]
/usr/lib/libtcl8.5.so.0[0x7f63977543b8]
/usr/lib/libtcl8.5.so.0[0x7f63977527b9]
/usr/lib/libtcl8.5.so.0(TclEvalObjEx+0x196)[0x7f6397711706]
/usr/lib/libtk8.5.so.0[0x7f6397a556f6]
/usr/lib/libtcl8.5.so.0[0x7f63977102f1]
/usr/lib/libtcl8.5.so.0(Tcl_EvalObjv+0x43)[0x7f6397710413]
/usr/lib/libtcl8.5.so.0(TclEvalObjEx+0x300)[0x7f6397711870]
/usr/lib/libtcl8.5.so.0[0x7f639779668f]
/usr/lib/libtcl8.5.so.0[0x7f63977102f1]
/usr/lib/libtcl8.5.so.0[0x7f63977543b8]
/usr/lib/libtcl8.5.so.0(TclObjInterpProcCore+0x110)[0x7f6397796ed0]
/usr/lib/libtcl8.5.so.0[0x7f63977102f1]
/usr/lib/libtcl8.5.so.0[0x7f6397710a5f]
/usr/lib/libtk8.5.so.0(Tk_BindEvent+0x890)[0x7f6397a29c90]
/usr/lib/libtk8.5.so.0(TkBindEventProc+0x185)[0x7f6397a2fa35]
/usr/lib/libtk8.5.so.0(Tk_HandleEvent+0x6c0)[0x7f6397a374c0]
/usr/lib/libtk8.5.so.0[0x7f6397a37b48]
/usr/lib/libtcl8.5.so.0(Tcl_ServiceEvent+0x7f)[0x7f639778764f]
/usr/lib/libtcl8.5.so.0(Tcl_DoOneEvent+0x8f)[0x7f63977878ff]
/usr/lib/python2.6/lib-dynload/_tkinter.so[0x7f639805f201]
/usr/bin/python(PyEval_EvalFrameEx+0x52fd)[0x4a290d]
/usr/bin/python(PyEval_EvalCodeEx+0x860)[0x4a40e0]
/usr/bin/python(PyEval_EvalFrameEx+0x4e4f)[0x4a245f]
/usr/bin/python(PyEval_EvalCodeEx+0x860)[0x4a40e0]
/usr/bin/python(PyEval_EvalFrameEx+0x4e4f)[0x4a245f]
/usr/bin/python(PyEval_EvalCodeEx+0x860)[0x4a40e0]
/usr/bin/python[0x52beed]
/usr/bin/python(PyObject_Call+0x47)[0x41d6e7]
/usr/bin/python(PyEval_EvalFrameEx+0x3921)[0x4a0f31]
/usr/bin/python(PyEval_EvalFrameEx+0x5837)[0x4a2e47]
/usr/bin/python(PyEval_EvalFrameEx+0x5837)[0x4a2e47]
/usr/bin/python(PyEval_EvalCodeEx+0x860)[0x4a40e0]
/usr/bin/python[0x52bdf0]
/usr/bin/python(PyObject_Call+0x47)[0x41d6e7]
/usr/bin/python[0x4254ff]
/usr/bin/python(PyObject_Call+0x47)[0x41d6e7]
/usr/bin/python(PyEval_CallObjectWithKeywords+0x43)[0x49c623]
/usr/bin/python[0x4d0c4d]
/lib/libpthread.so.0[0x7f639cf69a04]
/lib/libc.so.6(clone+0x6d)[0x7f639c4317bd]

Thanks,
Ian