Hi Mike,
Can you send me a smaller sample of your source XML and then what you would be expected as your target XML? If I see that then it will give me a better idea of what a good way to accomplish your requirement would be. I saw this string: {0061399=[1592345, 26728282, 29798989], 006139940=[1596889, 292909, 2989898], 006139996=[15965677, 989889, 990090] ...........................}
but I wasn't sure how this played a role in your message mapping.
Regards,
Ryan Crosby