I am having difficulties troubleshooting changes to some complex reports, particularly after doing a database refresh. 'This Field Name is not known' is not terribly useful without the name of the field that is not known. Similarly 'A number or currency amount is required here' without any clue as to where 'here' is, is not very useful. I would suggest a message like 'The Field Name [0} is not known' would be a huge boon to developers everywhere as it would at least give a clue where to look. The report I am debugging has 12 tables at the top level and 10 sub-reports so guessing where the error is, is not practical. Also, I am applying changes made from the database to an old report, so I am not in a position to change one thing at a time to see what breaks.
Please create a project to improve the information given in error messages by the designer. My productivity would go up considerably if I did not have to check hundreds of formula fields trying to figure out what is not working when the designer module already knows the problem.