## 6.4.2.4.1 UE-requested PDU session modification procedure not accepted by the network (FF)
- TP_5GNAS_AMF_UPN_REJ_01
- Verify the UE, upon receiving a PDU SESSION MODIFICATION REQUEST by the UE with a request of LADN modification and UE outside service area, sends a SESSION MODIFICATION REJECT with reason #46 (out of LADN service area).
- Verify the IUT, upon receiving a PDU SESSION MODIFICATION REQUEST by the UE with a request of LADN modification and UE outside service area, sends a SESSION MODIFICATION REJECT with reason #46 (out of LADN service area).
- TP_5GNAS_AMF_UPN_REJ_02
- Verify the UE, upon receiving a PDU SESSION MODIFICATION REQUEST by the UE with a request for a not supported service by the PLMN, sends a SESSION MODIFICATION REJECT with reason #32 (Service option not supported).
- Verify the IUT, upon receiving a PDU SESSION MODIFICATION REQUEST by the UE with a request for a not supported service by the PLMN, sends a SESSION MODIFICATION REJECT with reason #32 (Service option not supported).
- TP_5GNAS_AMF_UPN_REJ_03
- Verify the UE, upon receiving a PDU SESSION MODIFICATION REQUEST by the UE with a request including a PTI that is already in use, sends a SESSION MODIFICATION REJECT with reason #35 (PTI already in use).
- Verify the IUT, upon receiving a PDU SESSION MODIFICATION REQUEST by the UE with a request including a PTI that is already in use, sends a SESSION MODIFICATION REJECT with reason #35 (PTI already in use).
- TP_5GNAS_AMF_UPN_REJ_04
- Verify the UE, upon receiving a PDU SESSION MODIFICATION REQUEST by the UE with a request for a wrong 5QI, sends a SESSION MODIFICATION REJECT with reason #59 (Unsupported 5QI value).
- Verify the IUT, upon receiving a PDU SESSION MODIFICATION REQUEST by the UE with a request for a wrong 5QI, sends a SESSION MODIFICATION REJECT with reason #59 (Unsupported 5QI value).
## 6.4.3.6 Abnormal cases on the network side (FF)
