Hi ​@hs08 -

Yes..the VM is exactly the same. But, your app may not work right if you don’t quiese i/o during backup by using AAIP using MS VSS or pre/post scripts to do so. If your app is real sensitive to i/o interruption, then you do need to quiese the VM’s guest OS. VMware Tools Quiescense (assuming you’re using VMware) could be used as well.

Here the error what can i see in the event viewer

I can’t really help with the App error Handian. I can just offer a suggestion what you can do in Veeam for the Backup Job this app VM is in to see if using quiescense is done, and if not...maybe try implementing to see if your app then works normally upon restore.

Hi ​@coolsport00 

Noted and i know that in this forum we not help for app error. 

What did you mean of  ‘to quiese the VM’s guest OS’, this same with enabling the ‘application-aware processing?

Yes....that's what I was suggesting. 

ok will try

hi ​@coolsport00 

The error happening if i restore the VM to different platform (source VM is vmware and the destination is hyper-v). When i test restore to vmware the application is working normally. 

So i believe this happened because host id is different for example, or another possibility.

Ah... Ok. Makes sense. Maybe some issue with VMware Tools vs HV Integration Services? 

Hi ​@hs08 , I wuold suggest to ready the following doc. https://helpcenter.veeam.com/docs/backup/hyperv/byb_instant_recovery_hv.html?ver=120

especially “before you begin” I think you can find the solution here.