Upgrading SAP_BASIS component
I administer an ECC system which is on ERP 6.0 EHP6. For a particular issue, SAP has advised to upgrade the SAP_BASIS package to the latest level. Presently, the SAP_BASIS package is on SP4 and the latest available is SP14. My question is that is it enough to upgrade the SAP_BASIS component only (and maybe the SAP_ABA also which is often a prereq to SAP_BASIS)? What about the other components like IS-PS-CA, SAP_APPL etc which are also on level 4? I always thought of upgrading the whole stack.....