In Oracle 9.02 environment, after performing alter character set in database process(Export entire database, drop user A, alter character set[ZHT16BIG5 to ZHT16MSWIN950] , restart Oracle, create user A, import all information of user A), export using EXP command with following errors:
. exporting tablespaces definitions
.exporting PUBLIC type synonyms
EXP-00008: ORACLE error 6552 encountered
ORA-06552: PL/SQL: Compilation unit analysis termintated
ORA-06553: PLS-553: character set name is not recognised
EXP-00000: Export terminated unsuccessfully
Pls reply with the cause with solution as well. Thanks!