SQL error Unknown table 'nodefamily_parent'

This a great module. Kudos and thanks for programing it.

I can get it to work fine if all the nodefamily relations of the fusions are the same type, i.e. either all "child - parent" or all "parent - child", but as soon as I add a fusion with the other type I get a SQL error like this

user warning: Unknown table 'nodefamily_parent' in on clause query: SELECT node.nid, node.title AS node_title, node.changed AS node_changed, node_data_field_vendor_link.field_vendor_link_url AS node_data_field_vendor_link_field_vendor_link_url, ......

The Unknown table specified in the error is always the opposite of the nodefamily relation of the fusion which suggests to me that could be where the problem lays.

I hope that all makes sense.
Any ideas
many Thanks
Geoff