How to fix the Oracle error ORA-31691: The worker received message number string from the MCP, which is invalid.?

In this post, you’ll learn more about the Oracle ErrorORA-31691: The worker received message number string from the MCP, which is invalid. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-31691: The worker received message number string from the MCP, which is invalid.

Reason for the Error ORA-31691: The worker received message number string from the MCP, which is invalid.

Bad code.

How to fix the Error ORA-31691: The worker received message number string from the MCP, which is invalid. ?

You can fix this error in Oracle by following the below steps

Fix mcp code and reissue export/import command.