rspo/spool_id/loopbreak is a SAP Parameter attribute which is used to control Maximum loopcount for spool ID check 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 .
This parameter sets the loop value for checking for free spool numbers.
The value of rspo/spool_id/loopbreak must be the same as for
rspo/spool_id/max_number. The only value allowed is 99000.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.