My requirement is the order quantity should not be more than quotation quantity.
Ex : i create one quotation with 2 pc qty, and create order with reference to quotation . The same 2 pc was coped from reference document, if end user want to decrease the quantity 2 pc to 1 pc he can do it but he must not increase the order quantity 2 pc to 3 pc . if he enter system propose the warning massage but my client requirement is he want the error massage instead of Waring massage and stop the further process.
Please suggest me how can i fulfill this requirement.