Problem with multiline

Dear all,

My requirement is like thiis.

I have n senders(10) which i need to merge in to 1 and send to the receiver.

Logic implemented:

1)Loop:

Counter!=5.

2)Receiver

LineElement

3)Container1

Append single line element to multi line element

4)container2

Assign counter+1.

end loop

5)Transfermation

interface mapping

Single line element

target interface

Note:

If I take the line item as Multiline I am geeting an error that the element must not return multi line

6)send

targetinterface

when I execute the same I am getting 2 different messages ie 2 different files are generated with out merging.

Kindly help.

Thanks,

Srinivas