ADRS Text swaps in SAPscript Debugger

Question

Can somebody explain this to me?
Execute form F110_IN_AVIS in the SAPScript debugger (Activate the debugger then execute a printing test)
Why do all the ADRS text ID includes change?
Here is a trace snippet:
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  FOOTER    Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  HEADER    Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  ADDRESS   Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
  /: INCLUDE ADRS_SENDER OBJECT TEXT ID ADRS
  W TD439 INCLUDE TEXT ,ADRS_SENDER ,ADRS,D is not available
  /: INCLUDE ADRS_FOOTER OBJECT TEXT ID ADRS
  W TD439 INCLUDE TEXT ,ADRS_FOOTER ,ADRS,D is not available
  /: INCLUDE ADRS_HEADER OBJECT TEXT ID ADRS
  W TD439 INCLUDE TEXT ,ADRS_HEADER ,ADRS,D is not available
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
WRITE_FORM_LINES     Lines                                     Window  MAIN      Func. SET    BODY
ND_FORM
See the ADRS_SENDER, FOOTER and HEADERs, these are nowhere in the form itself:
INCLUDE &REGUD-TXTFU& OBJECT TEXT ID ADRS that is the footer
INCLUDE &REGUD-TXTKO& OBJECT TEXT ID ADRS that is the header
INCLUDE &REGUD-TXTAB& OBJECT TEXT ID ADRS here is the sender
It swaps these out for ADRS_SENDER, ADRS_HEADER and ADRS_FOOTER.  Why and how is that?  I actually changed the header to a real text element with an ADRS ID and it still changes to ADRS_HEADER.
Try it out and experience my frustration.
Thank You

Answer 1

Here's why:
The program which runs when you select printing test:
RSTXFPR1
Has a form called:
SET_DEFAULT_CONTENT
Which scans includes for ADRS and replaces it with ADRS_window_name.
Amazing, but how am I supposed to test that my headers will work if it changes the names on me???
*....... Set dummy-contents for windows................................
*....... HEADER, FOOTER, ADDRESS(SENDER) ...............................
FORM SET_DEFAULT_CONTENT USING SD_WINDOW.
DATA: BEGIN OF SD_LINES OCCURS 0.
      INCLUDE STRUCTURE TLINE.
DATA: END OF SD_LINES.
DATA:
SD_TEMPLATE LIKE TLINE-TDLINE
            VALUE 'INCLUDE ADRS_<name> OBJECT TEXT ID ADRS'. "#EC NOTEXT
  CALL FUNCTION  'READ_FORM_LINES'
       EXPORTING  WINDOW    = SD_WINDOW
                  ELEMENT   = SPACE
       TABLES     LINES     = SD_LINES
       EXCEPTIONS UNOPENED  = 1
                  OTHERS    = 9.
  IF SY-SUBRC = 0.
     LOOP AT SD_LINES. CHECK SD_LINES-TDFORMAT = '/:'.
        SHIFT SD_LINES-TDLINE LEFT
              DELETING LEADING SPACE.
        IF SD_LINES-TDLINE(8) = 'INCLUDE '.
           IF SD_LINES-TDLINE CS 'ADRS'.
              SD_LINES-TDLINE = SD_TEMPLATE.
              IF SD_WINDOW = 'ADDRESS'.
                 REPLACE '<name>' WITH 'SENDER'
                                  INTO SD_LINES-TDLINE.
              ELSE.
                 REPLACE '<name>' WITH SD_WINDOW
                                  INTO SD_LINES-TDLINE.
              ENDIF.
              MODIFY SD_LINES.
           ENDIF.
        ENDIF.
     ENDLOOP.
  ENDIF.