Hi Hong, The current ISOLDE release is only compatible with ChimeraX 1.3, I'm afraid. There have been some major library changes in the current ChimeraX daily builds, which will require a bit of work on my part to catch up to. Best regards, Tristan ________________________________ From: ChimeraX-users <chimerax-users-bounces@cgl.ucsf.edu> on behalf of Eric Pettersen via ChimeraX-users <chimerax-users@cgl.ucsf.edu> Sent: 17 March 2022 17:39 To: ChimeraX Users Help <chimerax-users@cgl.ucsf.edu> Subject: [chimerax-users] Fwd: Chimerax ISOLDE install Error Begin forwarded message: From: HONG ZHAN <hzhan3@wisc.edu<mailto:hzhan3@wisc.edu>> Subject: Chimerax ISOLDE install Error Date: March 17, 2022 at 8:02:25 AM PDT Hi all, I am installing ISOLDE on my daily build ChimeraX (v1.4.dev202203170703 (2022-03-17) and it showed this error: Downloading bundle ChimeraX_ISOLDE-1.3-cp39-cp39-win_amd64.whl Looking in indexes: https://pypi.org/simple, https://cxtoolshed.rbvi.ucsf.edu/pypi/ Processing c:\users\unchwaniwala\downloads\chimerax_isolde-1.3-cp39-cp39-win_amd64.whl Requirement already satisfied: ChimeraX-Arrays~=1.0 in c:\program files\chimerax 1.4.dev202203170703\bin\lib\site-packages (from ChimeraX-ISOLDE==1.3) (1.0) ERROR: Could not find a version that satisfies the requirement ChimeraX-AtomicLibrary~=4.2 (from chimerax-isolde) (from versions: none) ERROR: No matching distribution found for ChimeraX-AtomicLibrary~=4.2 I tried to look up online but not very useful information I found. Is a missing package I should install? Or how can I chnage the range for ChimeraX-AtomicLibrary? Thanks! Hong