Without seeing your .hbu file, it would be difficult to know why the import is failing.
However, I would strongly recommend updating both SMRT and CBC/HB to their latest versions (v4.23.0 and v5.5.3 respectively). Both are free updates.
After you update, run the estimation again and then try the import again. If you continue to have problems, please contact me at firstname.lastname@example.org.