SampleDebatchStream

Hi, I find the articles on this web site are very interesting and educatif. I have lost a lot of time trying to understand some details which I understood in 60 minutes on this web site. Thanks for you guys.
Now, I ran the exe;mple in reference, it works fine and debatches the large xml files to severl xml files conatiaing. But when I change the call ffor the getstream shape from
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ProcessStream = new StreamHelper.ProcessStream(Input, \”Body\”);
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To
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ProcessStream = new StreamHelper.ProcessStream(Input, \”Body\”, 10, \”<Start>\”, \”</Start>\”);
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I rebuild, redeployed several times without success.

There is also something I can not understand (may be becaus e I am mot so intelligent or dont know very well property schemas) is : what is the use of the \”PropertySchema1\” and why it is callled inside the Streamhelper. I read the BT help files but really didnt understand very well. So is it possible if you can describe what the following line does functionnally to the message :
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blankXlangMessage.SetPropertyValue(typeof(DebatchProperties.SeqNum),seqNum.ToString());

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I would highly appreciqte your help