Robert,

>Hi Kevin. I'm using an MM.Net textbox. I have a "Cost" field where the cost is unknown at the time of creation.
>When I click the mmSave button I get an error messagebox. When I mouse over the error icon it says the value
>cannot be null. The textbox is not null. It has a value of 0.00 If I put 0.01 in the textbox the error goes away. 0.01
>is not an acceptable value since it adds 0.01 to the total and throws off the "Work Order" total.

Is this a Windows or Web app? Is this an exception or an error message. If it's an exception, can you post the full stack trace?

Best Regards,