I have a problem with STP model because when i would like open it , i cant see anything. How i can repair it?
Which version are you using
well it seems some one who has given you this file has simply done "save as" stp while using UGNX or catia , one can never retrive stp file like this, its a bad practice, instead one has to go to export menu and then export to stp.
stp file will open in product only in catia.drag stp file in catia software