Working with java-libpst question?

Question

Java

Using the library, I'm trying to drag emails from a broken PST file into the database.
Successfully processed more than 146 thousand messages, after which I came across a problem with reading attachments.
One of the emails contains 90 attachments according to getNumberOfAttachments().
However, there are only 89 positions in numberOfDataSets, so when I try to read the 90th attachment, I get an array out of bounds.
I just can’t figure it out, because getNumberOfAttachments returns exactly numberOfDataSets ...