I have attached a mathcad file (2015). 
I have problem with opening the file, when i try to open it, it says: "mathcad application has stopped working", and shut down. I dont know whats wrong with the file, but I dont have any problems with opnening other mathCad files. It is just this one.
Are there someone who can help me?
And can you tell me what I shall not do to end like this again?