Target Field Mapping error

Question

i am having a source structure like
<a>
<b></b>
<c>
   <1></1>
</c>
</a>
and target structure like
<x>
<y></y>
<z>
   <9></9>
</z>
</x>
with
1. ofcourse the roots mapped to each other
2. an the element b is mapped to element y
3. element c is mapped to z
4. sub element 1 is mapped to sub element 9.
The minOccurs for c, z, 1 and 9 =0.
However, while execution of this mapping with the source element c missing in the payload a 'Cannot produce target element' error is encountered.
Can any one help find out why is this error being encountered when both the source and target feilds along with their subfields are optional (i.e. with minOccurs=0)?

Answer 1

ok there seems to be some confusion
my source structure is like
<a>
<b></b>
<c>
<1></1>
</c>
</a>
and target structure is like
<x>
<y></y>
<z>
<9></9>
</z>
</x>
and the mapping is as follows
a is mapped to x
a>b is mapped to x>y
a>c is mapped to x>z
a>c>1 is mapped to x>z>9
and both c and z have cardinatlity 0 to unbounded.
In this case if my source message does not have the element c, its processing leads to the said mapping error.
Edited by: diptee s on Mar 14, 2010 4:51 PM