Hi
Don't know Tekla BIM software as well, sorry for this.
You can check the Import/Export file format that supported in Inventor and Tekla BIM, and select a format (if have) that Inventor can export and Tekla can import or Tekla can export and Inventor can import. Mostfully some neutral formats have a value to try (for example, IGES/STEP...... or maybe .dwg).
Regards,
Kevin-Hongyuan Li
Software Quality Assurance Engineer
Design, Lifecycle and Simulation Product Group
Direct: +86 21 2039 6025
Email: Hongyuan.Li@autodesk.com
Autodesk, Inc.
NO. 130, Lane 91, E Shan Rd
Building 12, Floor 6,
Shanghai 200127, PRC
www.autodesk.com