EQA2473I EQAOPTS setting SUBSYS=ssss is in effect for use when reading source code from a library system.

ssss

Explanation
In a non-CICS® environment, an EQAOPTS with a SUBSYS
specification of ssss was found. If z/OS® Debugger needs to allocate a C, C++ or Enterprise PL/I
source data set from a library system that stores the source in a data set that has a DSORG of DA or
VSAM, then the SUBSYS=ssss allocation parameter will be used when z/OS Debugger allocates the data set.

Programmer response
If you need this support, ensure that the ssss subsystem is running on
the system that you are running z/OS Debugger
on.