Dump in webdynpro : Table

I have the following dump even if the table is set with lead selection !!!!
Any idea ?
Error when processing your request
What has happened?
The URL http://rixsasd6.sbbio.be:8012/sap/bc/webdynpro/sap/zhrtm_job_description/ was not called due to an error.
Note
The following error text was processed in the system HRD : The lead selection has not been set. JOB_LIST ꯃ䅢偲䅤
The error occurred on the application server rixsasd6_HRD_12 and in the work process 0 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: _RAISE_ELEMENT_NOT_FOUND of program CL_WDR_CONTEXT_NODE===========CP
Method: PATH_TABLE_GET_ELEMENT2 of program CL_WDR_CONTEXT_NODE===========CP
Method: GET_BOUND_ELEMENT of program CL_WDR_VIEW_ELEMENT_ADAPTER===CP
What can I do?
If the termination type was RABAX_STATE, then you can find more information on the cause of the termination in the system HRD in transaction ST22.
If the termination type was ABORT_MESSAGE_STATE, then you can find more information on the cause of the termination on the application server rixsasd6_HRD_12 in transaction SM21.
If the termination type was ERROR_MESSAGE_STATE, then you can search for more information in the trace file for the work process 0 in transaction ST11 on the application server rixsasd6_HRD_12 . In some situations, you may also need to analyze the trace files of other work processes.
If you do not yet have a user ID, contact your system administrator.
Error code: ICF-IE-http -c: 020 -u: STK73840 -l: E -s: HRD -i: rixsasd6_HRD_12 -w: 0 -d: 20070921 -t: 082340 -v: RABAX_STATE -e: UNCAUGHT_EXCEPTION
HTTP 500 - Internal Server Error
Your SAP Internet Communication Framework Team

Hi Stephan,
This error also comes if the initial lead selection property fo the node is not set correctly.
item_list nodes --> cardinality: 0..n, selection: 0..1, initialization lead selection: false
input_field nodes --> cardinality: 1..n or 1..1, selection: 0..1, initialization lead selection: true
Pls try the above combinations and test again.
Best regards,
Suresh

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