Imported Catia V5 R20 file opens empty with NO error

[agx]

Hello,
Can you please advise any remedy on a very old version of Catia (V5 R20).
We imported an stp file but opens up empty. We turned on ST1 on licensing and nothing changes.
Any insight please?
Thx

 

[Stick.]

Have you opened the file in another program to verify that the problem is not with the STEP file?