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Home/ Questions/Q 8825763
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Editorial Team
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Editorial Team
Asked: June 14, 20262026-06-14T06:57:25+00:00 2026-06-14T06:57:25+00:00

I want to preload a few packages in opencpu. I tried a few variations

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I want to preload a few packages in opencpu. I tried a few variations in preload[ ] in file /etc/opencpu/server.conf but it doesn’t work. wondering what is the correct syntax that goes into “preload[]” array field ? any example would help.

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  1. Editorial Team
    Editorial Team
    2026-06-14T06:57:27+00:00Added an answer on June 14, 2026 at 6:57 am

    It should be a vector of package names, e.g:

    "preload": ["ggplot2", "MASS", "lme4"]
    

    Note that packages that are preloaded are not attached. Hence, they show up in sessionInfo() but not in search(). This is to prevent side-effects or masking-conflicts.

    Once a package has been preloaded, attaching it should be almost instant.

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