Dear Amol
quite long discussion runs in your parallel thread:
I assume now: the hint in parallel thread does not help?
As mentioned by you: topic is discussed lot of time:
WWI report with Datamatrix Barcode issue
Steps to follow to output barcode in label
Hope some of these documents help (may be look on top:
What is a "Label" and how support SAP EHS Management "Labeling"
C.B.