The source database <source database connection> and Integration Service <Integration Service name> do not have compatible code pages (one way compatibility is required).
Validation error. The code page of the source database connection is not a subset of the Integration Service code page. This causes the session to fail when the Integration Service runs in the Unicode data movement mode.
If the Integration Service runs in ASCII mode, you can ignore this warning. If the Integration Service runs in Unicode mode, correct the problem with one of the following actions:
Choose a different source database connection for the session.
Choose a different Integration Service to run the workflow.
Correct the code page configured for the source database connection.
Correct the code page registered for the Integration Service.