I did this once using a VBS script. The script summed the AROPNFIL by customer and aged the balances, wrote a CSV file with the aged amounts, and finally updated the ARCUSFIL.(Think I still have this somewhere) I then scheduled the script using the windows task scheduler. I think you could also do a view on the AROPNFIL call it AR306090, then write an update script setting the ARCUSFIL to equal the AR306090 view. Then schedule the update script as a package in SQL.