Reason for SHO Failures over IUR(requested-configuration-not-supported) in Huawei

Dear Expert

After perform IUR trace we fond several RL_Setup_Fail with cause (requested-configuration-not-supported); Does Any body know what is the main Reason?

SRNC:Huawei.
DRNC:Nokia

Thanks

Could be Iur not properly configured between SRNC & DRNC