Dcapi error saying dll already loaded

If you try to open the Data Entry window, after you deleted, and then redeployed the RDC, you see the Dcapi error saying dll already loaded.

When you redeploy the .ear file, for example, after applying a patch, you must restart the WebLogicServer or the Data Entry Window does not open.

To fix this, you need to restart WebLogicServer.

Note:

In general, you don't need to delete and redeploy RDC. However, if you have to do that for any reason, follow the instructions as provided in Deploying Customizations.