Error with restore

[Eddy Dickens]

Hello guys,

Can you guys help me out, when restoring an backup i get the following message.

Error importing data: com.atlassian.activeobjects.spi.ActiveObjectsImportExportException: There was an error during import/export with <unknown plugin>:Error executing update for SQL statement 'ALTER TABLE PUBLIC.AO_9B2E3B_IF_COND_EXECUTION DROP CONSTRAINT fk_ao_9b2e3b_if_cond_execution_if_execution_id'

https://confluence.atlassian.com/jirakb/there-was-an-error-during-import-export-with-unknown-plugin-could-not-import-data-311918690.htmlhttps://confluence.atlassian.com/jirakb/problem-while-restoring-the-data-for-the-null-plugin-310378509.html
https://confluence.atlassian.com/jirakb/ora-00942-error-with-unknown-plugin-during-backup-restore-785457955.html

already changed the Activeobjects.xml file, sadly no result. 

Best regards,

Eddy