We are facing a strange issue. We have some sales orders. When user is trying to Access VA02 and modify a contract, We are getting an error as "No authorization to change this sales document". We could change some sales orders. We have observed two things here,
A) if a sales order has items in it,--> "No authorization to changes this sales document"
B) if a sales orders has no items in it --> "No problem with the authorization, we can modify the order".
Document type used for this sales order is ZC02. We have given ZC02 in role and 01,02,03,43,C1 and C2 activities in the roles along with proper Org values. still we are not able to open the sales order with change mode.
Could you please help me resolve this issue??