Batchmodel stop button

Hello 

For my project i am using Teststand 2014 and C# and us the batch model for the first time. My starting point is the batchUUT.seq example.

This example has a UUT imformation window with a STOP button. In my project I now set the ContinueTesting variable in the PreBatch callback to false. But this doesn't work all the time. Somtimes i get an error saying that is didn't relaesed the seq in cach.. 

My question is, is the a good example how to stop the batch models in C#