Why do I get the error "Can't delete Type. It may be in use or all the types may not be analyzed." when I try to delete a DFB in EcoStruxure Control Expert?

How can we help you today?

Issue:
"Can't delete Type. It may be in use or all the types may not be analyzed." error when deleting a DFB

Product Line:
EcoStruxure Control Expert

Resolution:
The error below occur when there are function block instances that have not been deleted