id summary reporter owner description type status priority milestone component version resolution keywords cc blockedby blocking notify_on_close platform project 207 ssl certificate verification error in cellPACK fetch Tom Goddard Greg Couch "ChimeraX python has a problem verifying https certificates. This is specific to the ChimeraX python, probably because we have openssl in prereqs instead of using the system ssl. Why are we including openssl? The prereqs/README should document why. The attached test program that uses urllib to open an https url does not work in ChimeraX but does work in Python3.5 installed on my Mac OS 10.11 system. Fetching cellpack data exhibits this error. But I've put a work-around in the code to verify certificates for cellpack fetch. Easiest to use the attached test program to reproduce the error. To test the cellpack case modify io.py fetch_file() to set check_certificates = True. open cellpack:HIV-1_0.1.6 Fetching url https://github.com/mesoscope/cellPACK_data/raw/master/cellPACK_database_1.1.0/results/HIV-1_0.1.6.apr.json failed: " defect closed major Infrastructure fixed conrad@… Mac OS X (Cocoa 64) ChimeraX