sql error 2289 performing INS on table DDLOG,sequence does not exist

Hi All,

I am installing PI 7.3. While installing primary application server I am getting the error at step"Abap Post Installation activities".

sql error 2289 performing INS on table DDLOG [dbsynseq 336]

***LOG BY0=> ORA-02289: sequence does not exist [dbsynseq 336]

db_syflush2 (TRUE) failed

please help me on this.

Thanks,

Mahendar