is your IBR running as service? if so, start it as an application.
what you mean by start it as an application.??
how can i start it as an application.??
Starting it as application means to start the server from command line . You can do this by navigating to <domain_home>/bin and use the following command :
Then test to see if the conversions work fine .
Along with that set ref*,requestaudit,system + Full verbose tracing section on IBR and replicate the issue . Then capture the logs to see the exact reason for the errors.