thanks @alien4u - I did not know that was the rule, so I'm going to tuck that away for future issues. I always find it funny how I get into these situations over the weekend and then one change triggers the whole process into place. So the first issue - I was trying to set the multiple bins on a line array called itembinlist - that is not correct, it needs to be set on the line property binnumbers. That lead to the error message that I need to form them like bin#(qty) - so I added that, which lead to the error that my total qty was not equal to the order qty. Final working solution - set the line item value for "binnumbers" to a string of bin#(qty),bin#(qty),etc..