Due date changes automatically in released production order

I have an Issue in Released Production Order: Navision 2009 Sp1

  1. Due Date in Released Production Order automatically rolls back ward to one year when “Released Production Order” is “Refreshed”

For Instance: When a Released Production Order Dated “15/01/08” is refreshed the Due Date automatically changes from Current work date “15/01/08” to 14/01/07

If you are refreshing " Backwards"

  1. May be your capacity fully loaded for previous year


  1. you dont have calculated the capacity calender for last year

please check your capacity calender. this problem because of capacity calender

Thx … Its the Issue of Capacity calender calculation

Thx A Ton