What exactly does dprocessingstate = I mean

We run a query every morning that tells us if there are documents stuck in work in progress that need to be resubmitted.  It also tells us if there are errors.  Currently it's been returning a large number of documents back as errors but when I look at them through repository manager it shows no errors. 

The query dertermines if there is an error if the dprocessingstate is equal to "I". I read the documentation on what the "I" value signifies but it's a little confusing. 

I = Incomplete Conversion; an error occurred in the
conversion after a valid web-viewable file was