By introducing Unite technology, it is possible to handle and use foreign CAD data like native Catia V5, NX or Solidworks files as well as exchange formats like STEP and JT in creo parametric. To keep track and maintain foreign data, it is mandatory that the original files are stored in Windchill. So, it is possible to enrich creo copies with additional features/datums and - thanks to ATB - to update these, when the originals get updated by new versions. Unlike all the other formats, JT files can only by opened or imported into creo from local disk but not from Commonspace or Workspace. So, unfortunately there is no use of JT files stored in Windchill.
So, please enable import of JT-Files from Workspace.
Additionally it would be great, if creo would create "Source & Image - Links" when exchange formats were imported in creo files, in order to support the "ATB/Update" use case for them as well.