ORA-12224 connection forms 6i with oracle database 12c

used ip insteaad of name and it got fixed, why?
No idea.

BBBV_3_17.WORLD=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=jreyes)(PORT=1522))(CONNECT_DATA=(SID=BBBV)))
BBBV_3_17.WORLD=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.3.17)(PORT=1522))(CONNECT_DATA=(SID=BBBV)))