This error is generated because the wp.base.jar file is missing from the deployment manager. The instructions in the Information Center to copy files from the primary node to the deployment manager are out of order. This step is the last step (step 6) in Installing the Everyplace Mobile Portal Instance on NODE1 and it should be done as soon as you have verified that the WebSphere Portal cluster setup works properly (step 3). The missing files are needed to complete the other steps.
Resolving the problem
To resolve the problem, follow the instructions from the Information Center to copy files to the deployment manager. Then retry the command.