I looked at the boinccmd command line arguments (7.16.11) but do not see a gui_rpc_port option.
Is there a way to cause one of the client tasks to gracefully quit using the boinccmd program?

If I use kill task does that cause the client tasks to write a checkpoint and exit?

I assume I can use the manager and then quit the manager causing one of the clients to stop but that is awkward

thanks for looking

Read the User Manual for the Boinccmd tool.

The GUI rpc port can be specified as part of the hostname argument:

hostname can be a domain name, an IPv4 address, or an IPv6 address. If the client uses a non-default GUI RPC port, you can specify it as hostname:port, IPv4_addr:port, or [IPv6_addr]:port.

I don't think boinccmd was ever optimized for use with multiple clients. I think you're stuck with using a GUI to exit that running client.

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Read the User Manual for the Boinccmd tool.

The GUI rpc port can be specified as part of the hostname argument:

hostname can be a domain name, an IPv4 address, or an IPv6 address. If the client uses a non-default GUI RPC port, you can specify it as hostname:port, IPv4_addr:port, or [IPv6_addr]:port.

thanks, forgot about "--host hostname:port "

"boinccmd --help" is not the same as RTFM

I was setting up a second client so that gridcoin research could obtain project info for "user2" while the system was crunching for "user1". There was no need for user2 to crunch, just needed login info for gridcoin.

Has anyone ever considered allowing the manager to add the same project with a different username ie: account? Probably no need since multiple clients can run