rspo/tcp/retries is a SAP Parameter attribute which is used to control Number of attempts to connect to remote printer information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
If an attempt to connect to a remote printer (type U) fails when sending
a print job, a number of retries are made. The number of retries is
specified by this parameter.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.