Hi we have a sales process for PROJECTS here first they create a project and then they do sales order VA01 and again they do delivery from projects here in sales order we get itemcategory as TAO and schedule line category as LP.and after delivery we do invoice with reference to sales order and we pass on to accounting this is the process.
Here the problem is
After doing billing document and passing to accounting document . if we come to Sales order change mode VA02 here at time level in pricing procedure we are still able to change the pricing .
here we want that pricing at item level to be greade out that means we must not be able to change price of the material again.
what setting to be done pl tell me its very argent.