Diagnosis
You have selected an expression by double-clicking. However,expressions can only be inserted in the condition if the cursor ismarking the column 'Expression 1' or 'Expression 2'.

System Response
The cursor has been automatically positioned on the next availableexpression column.

Procedure
Check whether the cursor refers to the required expression in thecondition (if necessary, position the mouse correctly in the conditionby double-clicking). Then repeat the insert operation.