Error: Invalid DSQ instance name < Source Qualifier transformation name> for session transformation instance <session transformation instance name>.
In the XML file, you specified a DSQINSTNAME attribute in a SESSIONEXTENSION element that references a non-existent SESSTRANSFORMATIONINST element.
Edit the XML file, and verify the DSQINSTNAME attribute matches the SESSTRANSFORMATIONINST element name. Or, export the object again and then import it.