perl adcfgclone.pl appsTier is unable to connect to RAC database
Solution:
1> Use Target System Database SID : PROD2 but not PROD
2>
Ensure that your sqlnet_ifile.ora has the line:
SQLNET.ALLOWED_LOGON_VERSION_SERVER = 8 (if
the initialization parameter SEC_CASE_SENSITIVE_LOGON is set to FALSE)
Reference: Interoperability Notes Oracle EBS 12.2 with Oracle Database 12c Release 1 (Doc ID 1926201.1)