Thank you for your post.
Instead of using Find and Replace, do the following:
1. Put your cursor in the Item Number field.
2. Pull down the Records menu and select "Replace Field Contents..."
3. Click the radio button "Replace with calculated result", and a new dialog box appears.
4. Enter: "NR" & Item Number
Note: Enter: "NR" &
.... and then click the Item Number field in the field list above on the left side.
5. Click "OK", and then click "Replace".
This replaces all Item Number values with "NR" followed by the Item Number for all the found set of records.
If you need clarification for any of the above steps, please let me know.