I currently have a runtime page that when navigated to runs a c-script to gather data. 

If I navigate to the screen the c-script executes and takes a few seconds to retrieve all the neccessary data (running a while loop). Once the data is collected and displayed on the screen I can then navigate around WinCC runtime with no problems.

The problem I am having is as follows:

If I navigate to the screen and then before the c-script has completed I navigate to another screen then WinCC runtime starts to hang/freeze almost and I can no longer navigate. I think the script is still active in the background and is causing this problem. The only way to resolve ths is to shut WinCC runtime down and restart.

Is there a way to either abort the script when navigating away from the screen or to prevent the user from navigating away until the script has finished executing?

I am using standard PCS7 V7.1 SP3

Thanks

Cameron