ding2tal/ding_place2book — pull request #6 by agnetemoos (2014-12-03 12:02:11+00:00)
Title: Missing library

It is the og_group_ref lookup that fails. In my fix, I just choose the first selected library. That is not a perfect solution, but it works for me. The alternative would be to open a big discussion about why events allow more than one library to be selected.