在使用Imp 或者impdp 做导入的时候，经常会遇见下面的错误.
ORA-31684: Object type INDEX:"U_CL_CTL"."I_T99_COD_NOS_SYNCLIST_BRDID" already exists
ORA-31684: Object type INDEX:"U_CL_CTL"."I_T99_COD_NOS_SYNCLIST_NOS" already exists
ORA-39083: Object type INDEX failed to create with error:
ORA-00959: tablespace 'TBS_PD_CUST_SALES_D_IDX' does not exist
ORA-39111: Dependent object type INDEX_STATISTICS skipped, base object type INDEX:"U_CL_CTL"."I_T99_COD_NOS_SYNCLIST_BRDID" already exists


这些错误，基本上都是因为缺少相应的用户、权限、或者表空间，所导致的。只要把缺少的添加上去，就可以顺利导入。