I have created a List A and a Discussion Board B. In order to link discussion in B with the item in A, I created a lookup column which get the value ID from item in A. This works pretty well when I create a new discussion in B, I can click on the lookup column to view the item in List A.
However, the problem is when I reply to the discussion, an error appears. It says that "File not found".
I believe that this is because the lookup column does not know which value to set. Can anyone help me to solve this problem?