Nicolas, I am inclined to agree with Jacopo. But a replacement of UomConversionDated by a new one (that caters to the new requirements) is also an option.
Be aware that both modification and replacement has impact on depending services and screens/forms. Best regards, Pierre Smits *ORRTIZ.COM <http://www.orrtiz.com>* Services & Solutions for Cloud- Based Manufacturing, Professional Services and Retail & Trade http://www.orrtiz.com
