Hi Gagan,
Yes I solved that. There were some problem with text/flat file. So my client the bank to have the file as per their requirement. The requirement was "there should be single line items for each check even if it is on single customers or multiple customers".
Screen shot from Lock box file:
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601500900002200000213093796018559550365713900EARTH COLOR
4015009601900900758610000220000
601501000000093080213093796018559550365713910EARTH COLOR
4015010601900900758610000009308
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So that worked. But also you need to check OBAX, OB10 & OBAY t-code whether the settings are correct or not.
Thanks
ST