I am using NAV2009 and supposedly, I have full administrative rights, though I am finding the system almost impossible to work with.
The scenario you mentioned is exactly what I am experiencing. Once the quote is converted to an order, I am unable to make any changes. If the customer decides they want to cancel an item, I cannot delete the line item, change the quantity of the items or update the line in any way.
I tried to reopen the order, but I am still unable to make any updates. I get an error message that says "You cannot change [whatever] because the order line is associated with PO# [whatever] in line [whatever.] I took this to mean that the order is Released, as you said, and try to reopen it, but it will still not allow me to update the order. The order is not shipped or invoiced and is still an open order. Also, the PO# that is associated is not the customer PO#, but the order number itself.
Is there a specific step to re-opening the order that I may be missing?
Thanks in advance for your help.