Post queue backlogged due to multiple ORA-904 %s: invalid identifier / invalid column name.
Target table missing columns.
1. Export/import target table to sync up target table structure using Oracle's Export/Import Utilties.
2. Manually create missing table columns via SQL statements. For example:
sql> alter table <table> add <column>
3. Enable DDL replication:
sp_ctrl> set param SP_OCT_REPLICATE_DDL = 3