Update on OpenStudio Slab Integration?

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I am struggling to include any ground temperatures in my OpenStudio 2.2 model. I have tried running the BCL measures for AEDG slab but the simulation fails before producing any *.err file. I created a simple 10x10 box with default spacetypes as a single thermal zone with ideal air loads and it still fails.

I tried running the slab utility from EPLaunch for the in.idf that is produced, but that also fails - only a slab.ger file is created with thousands of severe errors of "Did not find [ ___ ] in list of objects"

I saw in the question here that the slab would be integrated into OpenStudio soon - but this was over a year ago. Any updates since then?

It looks like another user here had a similar question that was never resolved.

I see from this question that since EnergyPlus 8.2, slab modeling has been somehow incorporated. I want to accurately model a radiant slab in OpenStudio without default ground temps of 18C all year. Any updates or comments would be appreciated.