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WebDynpro POWL applserver not found

Hi all,

I was trying to run a WebDynpro aplication with POWL component (POWL_UI_COMP) and I found the following error: "500 Internal Server Error".
ST22 is empty.
I was debugging some code and I found that:

(My groupname is comming with 'x' value, and in my table RZLLITAB there is nothing like that).

  IF GROUPNAME IS INITIAL.
    SELECT DISTINCT APPLSERVER FROM  RZLLITAB
                               INTO  TABLE INSTANCES
                               WHERE GROUPTYPE = GROUPTYPE.
    IF SY-SUBRC NE 0.
      RAISE NO_INSTANCES_FOUND.
    ENDIF.
  ELSE.
    SELECT APPLSERVER FROM  RZLLITAB
                      INTO  TABLE INSTANCES
                      WHERE GROUPTYPE = GROUPTYPE
                        AND CLASSNAME = GROUPNAME.
    IF SY-SUBRC NE 0.
      RAISE NO_INSTANCES_FOUND.
    ENDIF.
  ENDIF.

My GROUPNAME come from this function while calling for this "NEW TASK", so Im not able to trace the why this field is an 'x'.

CALL FUNCTION 'POWL_QUERY_REFRESH'
 STARTING NEW TASK i_query_data-result_cache_id
 DESTINATION IN GROUP m_refresh_srv_group
 CALLING me->refresh_callback ON END OF TASK
 EXPORTING
 i_query_data = i_query_data
 i_ignore_edit_lock = 'X' "already checked above...
 i_no_refresh_lock = 'X'
 i_reset_esttime = i_reset_esttime
 i_additional_paras = lt_additional_paras
 i_visible_fields = mt_visible_fields
 i_config_visible_cols = l_config_visible_cols
 i_config_visible_rows = l_config_visible_rows
 i_standard_type = i_standard_type
 i_messages = i_messages
 i_shadow_mode = m_shadowing_flag
 i_shadow_guids = mt_guids
 i_shadow_session_id = mv_guid
 EXCEPTIONS
 system_failure = 1 MESSAGE ls_msg "nt_1774367
 communication_failure = 2 MESSAGE ls_msg "nt_1774367
 resource_failure = 3
 OTHERS = 4.

Does any one can help me to make my webdynpro work?

Thanks in advance for all your help.

Best regards,
Mateus Pavan

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