Step: Login to Metalink
Go to Product certification page -- PeopleSoft Enterprise Certifications -- PeopleTools 8.4x Certifications -- CertificationPT84xThirdParty.xls
Refer CertificationPT84xThirdParty.xls file for your Operating System version.
It is always recommended to compile All the COBOL programs by supported version of COBOL compiler after:
1) PeopleTools Upgrade
2) Database Upgrade
3) Operating System Upgrade
4) Applying any patch and fixes
5) Applying Tax Updates
