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P4 Server Administration Documentation | 2026.1

# Require a minimum client version

P4 Server offers a mechanism to control which versions of client applications are able to connect to it.

To require a minimum version, set the configurable `minClient` to the appropriate revision.

You can also set the `minClientMessage` configurable to the error message that you want to be displayed when users attempt to connect to the server from a client application that needs to be upgraded.

For example:

    p4 configure set minClient=2019.1
    p4 configure set minClientMessage="Please upgrade to 2019.1 or higher"

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