Hi,
I've noticed that if I run a Tanimoto comparison in an Erlwood Fingerprint Similarity node, it creates a default output column 'Tanimoto', or allows you to custom name it. This is fine for one node. However, if I create a chain with multiple such nodes, the output column from prior Fingerprint Similarity nodes are deleted.
I've included a simple workflow that demonstrates the issue.
Regards,
--George