We suggest that you complete any unfinished models using your current version of Tekla Structures.
This version is not backwards compatible. When you create or save a model in Tekla Structures 2018, you cannot open it in older versions due to database differences.
Tekla Structures 2018 can only be installed on 64-bit Windows operating systems.
See the Tekla Structures 2018 Hardware Recommendations for more information.
Tekla Structures 2018 requires Tekla Structures License Server 2017. To check which license server version to use with your current Tekla Structures version, see Which license server version to use.