RE: Error 1 COBCH1624 : Cannot implicitly convert string to binary-long unsigned.

There are no errors if you use the tryparse for the conversion:

If you expect a double:

      set Amount to 0.0  *> optional

      invoke type System.Decimal::TryParse(TextBox17::Text, by reference Amount)

If you expect an integer:

      set Amount to 0  *> optional

      invoke type System.Int32::TryParse(TextBox17::Text, by reference Amount)

Each numeric class has its own parse & try parse