DataPump Import Reports ORA-01427 single-row subquery returns more than one row (Doc ID 1356066.1)

Last updated on NOVEMBER 28, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 and later
Information in this document applies to any platform.

Symptoms

When attempting to perform a DataPump Import (version 11.2), the following errors are reported.

ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PUT_DDL [TABLE:"schema_name"."table_name"]
SELECT NVL((SELECT 1 FROM SYS.KU$_TABLE_EXISTS_VIEW WHERE object_schema=:1 AND object_long_name = :2), 0) FROM SYS.DUAL
ORA-01427: single-row subquery returns more than one row

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms