unable to edit the model

What kind of model you got? In which format? What is your version? Does it work normally with other models?

Please provide more details in these cases.

Hi sir,

here are details u have asked,

1. The model is a bracket which is used in Aerospace  engine.

2. The format of the file which is sent by my guide is as following screen shot

like the  following i got the model 

3. i  have Altair inspire 2019 version 

4. yes, its working normally with other models

Thank you sir.

Although stl is imported in Inspire, you can't directly create a model from it, as far as i know.

But you could use polynurbs function for creating a geometry and then build your analysis over this new geometry.

Can't your advisor send you in another format, such as step or parasolid?