Grant
Can you do a CTRL A in the Error Call Stack message when it comes up and paste it into an email and send it to me at alan_sharp@trimble.com I will get developers to look at it in more detail - the issue based on what we can see in the exception snap that you sent through is too little to go on - but our development lead believes it to be related to your Username and Password that you use on your PC to Login - did you change your Password recently - if yes to you Logout fully and log back in?
If we can get the full error message we may be able to diagnose this for you - it seems to be caused more by the Windows OS and your PC Setup than by BC-HCE - but time will tell if we can get the full stack
Alan