Is it possible to communication between UnityPro Simu &

Goals and Symptoms:

Is it possible to establish communication between the UnityPro Simulator, the OFS Sever and a SCADA. I need this to do Factory Acceptance Testing but I don't have Physical PLC's.

OFS version 3.31 Intouch 10 UnityPro 2.3 or 3.0 I have tried to set it up to the "Local Host" address (127.0.0.1) without success.

Causes and Fixes:

I configured it on my computer and it works well.
My platform is:
- UNITY PRO XL V3.0 (Simulator mode)
- OFSV3.31 (Com: Modbus TCP/IP addr:127.0.0.1 and Symbol table: XVM file)
- OFS Client