Hi Devayani ,
If your preproduction system is a recent copy of the Production system , The SPAU in preprod should be exactly the same that of the production system ( If the copy is very recent ) . Hence this is what the developers should concentrate into .
As your preprod system is being patched , is there a production transport freeze ? If there is a prodcution transport Freeze you can expect the same SPAU list in production .
If not , before the Go-Live plan to do a dress rehearsal ( In pre-prod , with the most recent copy from prod ) just before the go-live and check whether the spau lists are the same .
As for the other error message , please provide your system patch levels / DB , Kernel and error screenshot
Thanks ,
Manu