Hello.
I attached a Ryzen 7 3700X and an Intel i7-8700k to the project.
The Ryzen is doing fine, getting itself iThena work while also crunching for numerous other Boinc projects.
The Intel has had more errors than successes running just a second CPU project.
stderr tells me this:

<core_client_version>7.14.2</core_client_version>
<![CDATA[
<message>
process exited with code 127 (0x7f, -129)</message>
<stderr_txt>
../../projects/comp.ithena.net_usr/wrapper_26014_i686-pc-linux-gnu: error while loading shared libraries: libgcc_s.so.1: cannot open shared object file: No such file or directory

</stderr_txt>
]]>

The machine id is 223, and it's running Debian 10.

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Greetings, Jens

Hello.
I attached a Ryzen 7 3700X and an Intel i7-8700k to the project.
The Ryzen is doing fine, getting itself iThena work while also crunching for numerous other Boinc projects.
The Intel has had more errors than successes running just a second CPU project.
stderr tells me this:

<core_client_version>7.14.2</core_client_version>
<![CDATA[
<message>
process exited with code 127 (0x7f, -129)</message>
<stderr_txt>
../../projects/comp.ithena.net_usr/wrapper_26014_i686-pc-linux-gnu: error while loading shared libraries: libgcc_s.so.1: cannot open shared object file: No such file or directory

</stderr_txt>
]]>

The machine id is 223, and it's running Debian 10.

You are missing a file needed by the iThena.Computational project (libgcc_s.so.1). Install or update that file and you should be good to go.
The Ryzen is running a different version of Linux with a more recent version of GLIBC and that probably has the file that your Intel machine does not.

Conan

I find I need to stop the Measurements application then run the Computation application otherwise I get immediate Computation errors. When it is running I can un-suspend the Measurements tasks.

I find I need to stop the Measurements application then run the Computation application otherwise I get immediate Computation errors. When it is running I can un-suspend the Measurements tasks.

That is strange as I have not struck that issue, both run together on Linux and Windows, at least so far.

Conan

I find I need to stop the Measurements application then run the Computation application otherwise I get immediate Computation errors. When it is running I can un-suspend the Measurements tasks.

I haven't seen any problems running the .Measurements and .Computation projects at the same time on Windows and Linux computers.

check your RAM - Graph allocates up to 10GB - and check the required libraries - maybe Debian 10 hasn't everything.