I followed these 5 steps
1. Enter billing Doc in VF02
2. Select an Item
3. Click Item Pricing Condition
4. Click Update button
5. Choose Carry out new pricing
After this, I found some of the condition types missing in the billing document. where Can I find the code for this deletion of records. I went thro debugging but its taking lot of time as standard program is involved.
Please suggest a way forward.