Ok, I don't think there is a relation with your other problem, this is a different issue so again, send me a MaxBulk Mailer document that fails on you, I mean, I need to see the error in front of me with a document you have made to reproduce the error. Then I will investigate where the problem comes from, fix the problem and again use you document to confirm the problem has been fixed. The procedure is explained here: I have found a problem - How should I report it?
I believe you can create one single document with both reproducible issues.