How to copy the artifacts from slave to Jenkins workspace?

I'm running a jenkins job on a slave and i want to store the generated artifacts in the server.Since the job is currently running on the slave the artifacts are also created there.

I tried using post build actions --->archive the artifacts.But it throws the following build error

ERROR: No artifacts found that match the file pattern "**/*.gz". Configuration error?ERROR: '**/*.gz' doesn't match anything: '**' exists but not '**/*.gz'

Any help in this regards is highly appreciated.