we can convert the tekla(ifc format) file into stp through solidworks. just open the ifc file in solid works and save as stp file. then you you can open this in inventor. but working with this stp file bit tough. try and give your comments
What can a file did you receive first of all? The only way to receive a Tekla model is by giving you a file with extension *.db1. This is the original file to open in Tekla. Then you can do a real question to convert from one file to another one. It could be *.ifc, dwg, dgn stp. I work in many platforms for conversions and I can help you with that as well. Let me know if you still need help on this subject.
You have to import it into Inventor in STP 219 format and in the import options de remove the flag in divide periodic faces otherwise all the faces, cylindrical solids will be divided into 2. If the geometry is simple you can choose ACIS which was the modeling engine up to Inventor 6. Then he bought the ACIS source codes, today from solidworks dassault systemes, and developed it as Autodesk shape manager, but the base still remains that. Greetings from Luigi, former Autodesk technician and Solidworks