Using calllib function to GetLicense. matlab crashes without error when license not found

Hi all

I have compiled an executable on Matlab R2014a which needs to verify the license on a dongle key before it can be launched. Below is the part of the code that I have used to get the license

i = int32(1); pointer = lib.pointer('stringPtrPtr', {'-version'}); calllib('IPGwin64','GetLicense', i, pointer);

The code works fine. However if the dongle is not inserted in the computer, matlab crashes without giving any error. what I would like to do is to have pop up window showing the reason for crash.

I would really appreciate if someone could help me sort this out.

Thank you