Quote Originally Posted by pcotten
The import went fine for a while and then suddenly I am getting the following errors.

IMP-00019: row rejected due to ORACLE error 1
IMP-00003: ORACLE error 1 encountered
ORA-00001: unique constraint (AP.AP_PAYMENT_DISTRIBUTIONS_U1) violated
Any ideas?
you are importing the dump which has duplicate values and there is unique constraint on the object. May be you are importing in the same schema. Check the import logs and do it again.