I have very strange problem with some of purchase orders.
I create the purchase order and saved it.
When i tried to chenge purchase order system does not respond and dont allow me to save the order.
Transaction gets locked which can be seen in SM12 tcode also.
Also when i tried to release the PO system again performs the same way and trasaction gets locked.
I checked the release strategy, customization, material and vendor master, also the authorizations..
Basis person also checked it but couldnt able to locate any specific reason.
In every PO i faced the problem Material and Vendor is same.
Waht could be the reason thet transactions are getting locked when working with these POs , any specific things to be checked , configuration, or Notes to be applied.
Please guide me in this as i am not able to process these very important POs.