SYMPTOM:
"Error An internal error has occured in the Analytical Engine" error message appears when running a report in Developer, that has an attribute in the pageby whose column alias datatype does not match the datatype returned by the database.
CAUSE:
This is caused because the page by feature requires the correct column alias be set for an attribute in order to process and display the data.
ACTION:
Edit the attribute and ensure the column alias for each attribute form matches the datatype the database returns
