ISSUEThe web front end server has been configured with WEF server role in the registry
HKEY_Local_machine\software\Microsoft\shared tools\web server extension\14.0\wss
there is an entry call ServerRole which is set to WFE, normally this would be application. in the Manifest of the solution the deployment server type is set to "ApplicationServer"
This is the reason why our solutions our solutions will not deploy to any server where the server role is not "Application"