lucene2seq and empty fields

Hi all,

I have running into a problem with lucene2seq and I'm wondering whether any of you can help me. I have a Solr index in which the documents contain several fields and some of these fields are empty in some of the documents. The problem that I am encountering is that lucene2seq gives the error:

Error: java.lang.IllegalArgumentException: Field 'XXXXXXX' does not exist in the index?

when an empty field is encountered. I have verified that the field exists by querying the Solr (but as I have said, it is empty). Can anyone help with this?

Thanks,

Tom