Office Web App deployment error on Windows server 2012 R2

Question

I am using windows server 2012-R2 and which was having Office web apps configured previously. Due to some technical error server crashed and i re-installed it as per MSDN article. Note:- when i run New-OfficeWebAppsFarm command first time after server rebuild i get the error "Office web apps server has encountered an unrecoverable failure" , but this error is only one time , if i run the same command again with all properties second time, my Office web app deployment was successful and I can see the response correctly. But the problem is , when i try to set this server as OWA server from my SharePoint server getting the error as below.

New-SPWOPIBinding : Sorry, we have encountered an error and New-SPWOPIBinding
has failed.
At line:1 char:1
+ New-SPWOPIBinding -ServerName "servername.com" -AllowHTTP:$true
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Microsoft.Share...tNewWOPIBinding
   :SPCmdletNewWOPIBinding) [New-SPWOPIBinding], SPCmdletException
    + FullyQualifiedErrorId : Microsoft.SharePoint.PowerShell.SPCmdletNewWOPIB

Response after running New-OfficeWebAppsFarm command second time

When i try to check the deployement status again with command Get-OfficeWebAppsFarm getting this error.

Answer 1

I fixed the issue, There was an error in the web config file,

 <identity impersonate="true" /> 

was there and i changed it to

<trust level="Full" />

<system.web>                          <system.web>
    <identity impersonate="true" />             <trust level="Full" />
</system.web>                           </system.web>