[Chimera-users] OS differences in Chimera

Marco J. Müller marco.mueller at tu-bs.de
Mon Mar 11 09:28:52 PDT 2019

Dear Chimera team,

I do have a question regarding differences between OSes. Our group
recently encountered a problem in the surface creation of proteins,
which might be related to the OS.

Recently, for some structures, directly obtained from the PDB (e.g.
6GB5, 1H97, 4YLJ) or prepared single-chain structures for docking runs,
the surface creation of the proteins resulted in error 5 from
mscalc.exe. This, however, seems to be an isolated problem of the
Windows versions of ucsf chimera 1.12-1.13.1, as the same versions of
chimera on macOS or Linux (Lubuntu) could successfully create these
surfaces. Even more strangely, we are pretty sure that we could show
surfaces of the very same files about half a year ago with these
versions (1.12 and 1.13rc1). Did a recent update of Windows change the
behavior of chimera? ChimeraX could actually show these surfaces on
Windows, but gave us some other troubles.

We did have a look at
which did solve our problem for now, but we would like to know whether
we can improve the reliability of chimera's functions, aside from tips
mentioned in

An older post
indicates that it is a numerical problem, is this still the case and
means that it is indeed OS-dependent?

Thank you in advance,

Marco J. Müller
PhD student

Technische Universität Braunschweig
Institute of Medicinal and Pharmaceutical Chemistry
Beethovenstr. 55 | 38106 Braunschweig | Germany

More information about the Chimera-users mailing list