So after you read you VO and read VCM you then select the module to code and select "Read Coding Data" ,
Then you select 'Edit FDL' , change the value and you save the config (top buttons) and you go back
back by pressing top left green (back) arrow button.
You should see the FA again and by right clicking select "Activate FA".
You should see a green active text next to the FA.
Select the CAFD you just edited and select "Code FDL" in the SVT box( right hand middle portion of your UI)
Now the coding process should start and complete without error
You also may want to power cycle with the ignition switch
After you followed all of the above steps it should use the new values