If any of you purchased the Calvin 500 pre-pub, you may have experienced what I, and many others, experienced. It's noted here: problems indexing after Calvin 500 install - Logos Bible Software Forums
As many know, when Logos 4 downloads new resources it updates the index file for searching. After Calvin 500 downloaded, the indexing would always fail a few mins into the update.
The solution to the problem is to close Logos 4 and delete the index directory. Launching Logos 4 after doing this will cause Logos to rebuild the index from scratch and it works fine after that.
As many know, when Logos 4 downloads new resources it updates the index file for searching. After Calvin 500 downloaded, the indexing would always fail a few mins into the update.
The solution to the problem is to close Logos 4 and delete the index directory. Launching Logos 4 after doing this will cause Logos to rebuild the index from scratch and it works fine after that.