This stl file reader loads binary STL files. I am unfamiliar with Catia, or the type of STL files exported by Catia. If you do not have a binary STL file, you should try one of the ASCII STL file readers available on the File Exchange.
Have you read the help for this program? When you run this program, it will output the faces, vertices and normals from the STL model.
I also find it odd that you rated the program as three stars, but do not seem to have used it at all.
I have a problem . I have saved a catia figure in stl format
now i want to read its vertices and normals in MATlab
can you please help me with the function .. this is related to my final year project.