Description
You get this message if you are using PCS 7 options packages that are not licensed. This happens, for example, when using the "Redundancy" options package from PCS 7 OS, but do not have a license installed for it, or you have created a PCS 7 OS multi-user project, but have not installed a PCS 7 OS server license. You have the following options for avoiding this message.

1. PCS 7 V4.x and V5.x
   In versions prior to PCS 7 V6.0 (V5.x, V4.x), no OS Runtime should be enabled on the ES as long as the redundant partner is entered in the redundancy properties. In these versions you should disable redundancy when testing the OS project on the ES. This is necessary, because the redundancy settings immediately become effective as soon as you activate/test the OS project. If you have a multi-user project, you will still get the message about the missing WinCC server license. Acknowledge this message or move it to the background so that you can continue testing on your ES.
   
   Warning 
   Reactivate redundancy after testing on the ES prior to transferring the OS project to the target station.
   
   
2. PCS 7 V6.0 and newer
   In PCS 7 V6.0 and higher, you start simulation of the OS via SIMATIC Manager > Options > Start OS Simulation. Mark the OS to be simulated and start WinCC Runtime via "Start OS Simulation". With this call a copy of the OS project is automatically created for testing and redundancy is disabled prior to Runtime starting. If you have a multi-user project, you will still get the message about the missing WinCC server license. Acknowledge this message or move it to the background so that you can continue testing on your ES.

Note
More information on this topic is available in the PCS 7 Online Help under Getting Started PCS 7 - Part 2 > Preparations for Getting Started - Part 2 > Using a local PC station > How is a PC station used?.