In order to reach the debugger you have switch on update debugging that is first thing.
- My question to you is have you implemented any code in sales order exits or some one else has done it.
- Does it happen for all the different sales order..?
- Please check whether in MV45AFZZ some code has been done in the sub routine like USEREXIT_SAVE_DOCUMENT_PREPARE etc
- Please search on service.sap.com for the same dump
- Most probably its the custom enhancement coded in a wrong way is the reason.
Nabheet