Graphical mapping issue with useOneAsMany if segment does not exist

Question

Hi all
I have an issue with graphical mapping in an IDoc to file scenario. I need to have header level fields mapped to line item fields. Whether or not and how many source header segments of the same type exist depends on a qualifier (QUALF). This is generally working if I use the following graphical mapping:
if QUALF = 001 then <source>  ->  removeContext  ->  useOneAsMany  ->  splitByValue  ->  <target>
... with setting QUALF, <source>, and the second input for the useOneAsMany to the highest possible context node.
Nevertheless, if the segment with the qualifier 001 does not exist in the source then the mapping throws the error "Too few values in first queue in fuction useOneAsMany". Whatever I've tried, the mapping wants to execute the useOneAsMany statement anyway and I haven't found a way to omit this. Whether the target would be created with an empty value or not created at all would be secondary. Would eventually somebody have a solution to this problem?
Thanks in advance,
Daniel

Answer 1

Daniel,
try using mapWithDefault function before useAsmany
if QUALF = 001 then <source> -> removeContext -> <b>MapwithDefault</b>->useOneAsMany -> splitByValue -> <target>
I think it takes care even if the value occur in the contaxt or.
Babu