Hello, I have a 5/04 error message - IP address not found. The target device is a Compactlogix processor connected via a remote DHRIO to ethernet bridge. The Compactlogix processor has since replaced a 5/05. The comms was working before so because of this, I think the RSLinx config for the DHRIO and ethernet card should not need to change. The data type and size in both configurations is the same. An array of 10 integers. The SLC mapping has been setup in the 5000 developer with the data table number from the SLC and the tag name in the compactlogix program. The tag is in the controller tag database. I am not sure what needs to change to get the message to work. Any ideas would be appreciated. Regards ged