The server's errors.csv has an entry for a failed counter command whenever your populate option does a "pin at label" to a changelist (number).

This applies to freestyle jobs or pipeline jobs running p4sync/checkout with a "pin at label".

Builds complete, the errors.csv entry does not affect the build.

To reproduce:

configure your p4d server for structured logs:

   p4 configure set servername#serverlog.file.1=errors.csv

Create a freestyle job.  Any credential.  Any legal client view.

Populate option Autocleanup and sync (don't think it matters)

for "Pin build at Perforce Label" enter a recent changelist # like "123".

Setup polling, say at */2 * *. * *.   

Wait until it polls.  You'll see the problem "p4 counter nnnn"  in the polling log:

  P4 Task: establishing connection.
... server: xxx-u231.das.perforce.com:1666
... node: xxx-u231
... p4 counter 123 +
P4: Polling with range: 76,123

examine errors.csv:

4.50,1670374239,27658338,2022/12/06 16:50:39 027658338,2728954,1DE7D3AC6EA1152BE2C16770F02D171A,master,1,jbrown,jbrown-u221,user-counter,127.0.0.1,p4,2022.1/LINUX26X86_64/2285021,123,error,6,12,Purely numeric name not allowed - %27123%27.

—

Comes from ConnectionHelper.isCounter().  Shouldn't run the counter command if name is a numeric.