Why does my try-catch statement not catch an exception?

I have a problem with a function that reads text-files and stores the results in mat-files. Sometimes an exception occurs and the function stops. When I restart MATLAB, the function then can proceed and read the file. I want to solve this with a try-catch statement. But when my function (xmlfolder2mat) crashes the catch statements are not invoked. Here is a short example:

>> try, xmlfolder2mat, catch, disp('Hello'); end
Loading folder 1 of 56
Caught "std::exception" Exception message is:
Message Catalog MATLAB:FileIO was not loaded from the file. Please check file location, format or contents__

However, as mentioned above. When I restart MATLAB the program continues on and reads the current file wihtout.