Dear ChimeraX team,

The ChimeraX download site appears unreachable from my side. I can resolve and ping www.cgl.ucsf.edu / rbvi.ucsf.edu, but both HTTP and HTTPS connections are refused.

Example:

DNS resolution works
ping works
curl -I http://www.cgl.ucsf.edu/chimerax/download.html → connection refused
curl -I https://rbvi.ucsf.edu/chimerax/download.html → connection refused

Could you please confirm whether the download server is currently down, and if possible provide a temporary direct link for the current Linux installer?

Thank you very much.

Best regards,
Samo Lešnik

On Tue, Mar 31, 2026 at 1:59 AM Eric Pettersen <pett@cgl.ucsf.edu> wrote:

Hi Samo,
That bond isn’t because of the distance, it’s because it’s indicated in the input file you are using — either the topology file if its a trajectory, or by the CONECT records of a PDB file (or the equivalent for mmCIF). It wouldn’t be hard to post process the structure to remove those bonds. I’ll open a ticket for that so you’ll be notified when it gets implemented. In the interim, it is really easy to remove those bonds. Just use the command “~bond H”.

--Eric

Eric Pettersen
UCSF Computer Graphics Lab

> On Mar 27, 2026, at 4:27 AM, Samo Lešnik via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
>
> Dear developers,
>
> I have a small suggestion: if the residue name is detected as HOH, TIP3, WAT, ... (whatever the list of waters are), then the bond between H2 and H1 is not drawn, as this is an artifact of the small distance.
>
> Best regards,
>
> Samo
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