Unhandled exception error in Coin3D ( Open Inventor ) - c++

Question

I wanted to make a general function that would search for a class type in a node and returns its address. It is defined below
SoNode* searchandgive(SoType searchtype, SoNode* searchnode)
{
SoSearchAction mysearch;
mysearch.setType(searchtype);
mysearch.setInterest(SoSearchAction::FIRST);
mysearch.apply(searchnode);
if (mysearch.getPath() == NULL) {
std::cout<<"No property of this type was found";
}
SoPath* mypath=mysearch.getPath();
return mypath->getTail();
}
But when I pass a search type like SoCoordinate3::getClassTypeId() and the node to be searched for senode as given below:
SoCoordinate3 * mycoords=(SoCoordinate3*) searchandgive(SoCoordinate3::getClassTypeId(),senode);
const SbVec3f *s=mycoords->point.getValues(0);
std::cout<<" " <<s->getValue()[25]; // Some point
But the last line is generating a Unhandled Exception Error. Please tell what am I doing wrong here. The last line is valid since the same written inside the scope of the function works but not here.

Answer 1

With this you are standing that mysearch.getPath() could be null:
if (mysearch.getPath() == NULL) {
std::cout<<"No property of this type was found";
}
but below you are using that without any check:
SoPath* mypath=mysearch.getPath();
return mypath->getTail();
so this can raise an Unhandled Exception.
Another poitn is the line:
std::cout<<" " <<s->getValue()[25]; // Some point
There is no check about how many points are in the vector, and this as well could cause an exception.