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P4 Virtual File Service Documentation | 2026.1

# Enable P4

To enable P4 VFS to work with P4, the P4 command-line client, you must convert the client that was originally set up as `noaltsync` to support the alternative syncing mechanism used by P4 VFS:

Brand new client | Client that already has files
--- | ---
Change the client to altsync. In the client spec, for Options, change from the default `noaltsync` to `altsync` Run `p4 sync` | Get revision `0` so that the client is empty. `p4 sync ...#0` Change the client to altsync. In the client spec, for Options, change from the default `noaltsync` to `altsync` Run `p4 sync`

Such a conversion can also be done from the P4V client. See Enable P4V .

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