SYMPTOM:
When the user executes a report, the following error occurs:

Sample Code/Error
Error(s) occurred while loading report: DSSSQLEngine: Schema loading error: There is error in report definition. The element shown in the following hierarchy has invalid definition or no longer exists: Report (test). -There is error in report definition. The element shown in the following hierarchy has invalid definition or no longer exists: Report (). -Filter (Local Filter). -Filter Unit-Filter Unit-Schema/Report Loading is interrupted by invalid data..
CAUSE:
This issue is caused by a filter with an empty advanced qualification definition. The user should see a filter with a similar definition below:
Note: The root cause of this type of inconsistency is still under investigation. Creating an empty filter definition is not possible through regular usage.

WORKAROUND:
Remove this problematic filter and redefine it again.