I have two forms Main (customer accounts) and Sales (per account). I've created a command button in the Main form to run a macro. The macro is an Openform action. the form name is "Main" and the condition is "[Account]=[Sales].[Cust-acc-num]. When I hit the command button a dialogue box prompts me for "Sales.Cust-acc-num". I've checked the spellings and field types, I've no relationships or primary keys. If I manually enter an existing detail from "Cust-acc-num" I see the results I expect. Any thoughts?