What can be the reason of 100% IRAT (4G to 5G) Handover getting failed in Preparation phase?

Dear Experts.

What can be the reason of 100% IRAT (4G to 5G) Handover getting failed in Preparation phase?

ANR is activated for LTE to NR NBR Addition.

What do you mean by preparation phase?

Ho_require is being sent out or not? You can confirm from log.

HO Require is sent.

:+1:
Check for target log, if this has been received.

And log / call flow in target gNB.

Thanks. But I have only OSS KPIs…