Unfortunately, after all of the upgrades to Honeybee, there are some bugs in the last two versions of OpenStudio (version 2.6 and 2.7) that break specific Honeybee workflows (even though 95% of use cases are probably still ok). For this reason, we still recommend that users install an older version of OpenStudio - specifically OpenStudio 2.5 - in order to ensure full compatibility with Honeybee.