An ESXi 4.x.x hosted VM having a connected *.flp wil render the following job / task error upon hot-add replication >
An internal error occurred during execution, please contact Vizioncore support if the error persists. Error Message: API Call failed with message: Invalid configuration for device '13'.
Serialization of the conected *.flp causes this behavior.
Disconnect / remove the connected *.flp & re-try the replication job.
Note this corrollary Vmware KB : http://kb.vmware.com/kb/1001416