Is that a call to std::find? std::find does not throw exceptions. You have to make sure that the argument that you pass to std::find is correct.
If it's compiled with Visual C++ in debug mode it could be some kind of non-standard exception mechanism that you can catch in some other way. I don't know how. I don't think it's a good idea to try to catch it because it will not work in release mode or with other compilers.