I am sorry to hear that you are experiencing this issue.
You might be hitting a known issue
, which was fixed in the latest internal build we released(v2013.1.1002). In order to avoid this you will need to upgrade your Test Studio up to the latest internal build that you can find here
. Please note that you will need to upgrade the Run-Time on your execution machine as well. Here is the installer file
for the Run_Time.
Another thing you might try is to navigate to your project's folder, then go to the Bin folder and delete the files there, they should be two files named the same way as your project but with different extensions, they will be created again automatically. Then please try running your test list.
Another thing that you may try, this is in case you are using any external dll's in your project. Please copy those dlls into the project folder and add the references from there.
If none of these help:
1) Please send us the application log
when this problem happens. Clear it first and then reproduce the issue.
2) Please provide us with a copy of your tests so we can reproduce the issue on our end and give you a solution.
Hope to hear from you soon.