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When I opened multi-structure xyz file, molekel quits after reading the structures. This is what Visual Studio 2005 gives when debugging: Unhandled exception at 0x00000000 in Molekel.exe: 0xC0000005: Access violation reading location 0x00000000. Any thought? Thanks!

Actually we have not tested yet Molekel on Vista, we'll start testing after the OpenGL drivers get better; the NVIDIA forceware driver released on March 2 2007 supporting VISTA is still beta.