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Panel variable model line


IBM Mainframe Forums -> TSO/ISPF
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WilliamDownie

New User


Joined: 01 Jul 2020
Posts: 20
Location: UK

PostPosted: Fri Dec 31, 2021 6:28 pm
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I have having a problem using variable model lines. Below is a cutdown version of my panel. The purpose of the panel is to list members. Optionally, when 'descyn' set to 'Y', it will output a row containing a description of the member, and following that a static separator line.

Code:
)ATTR
# TYPE(TEXT) INTENS(LOW) SKIP(OFF)
_  TYPE(INPUT) INTENS(HIGH) CAPS(ON)
@ TYPE(OUTPUT) INTENS(LOW) COLOR(GREEN)
)BODY EXPAND(//)
Command ===>_ZCMD
+
+    Description ===>_z+
+
+Act Member
+-/-/
)MODEL ROWS(ALL)
&MDL1
&MDL2
&MDL3
)INIT
.ZVARS='(descyn ACT)'
IF (&descyn=' ') &descyn='N'
)PROC
IF (&DESCYN='N')
  &MDL1='_Z# @MemLoc                                                  '
  &MDL2='OMIT'
  &MDL3='OMIT'
ELSE
  &MDL1='_Z# @MemLoc                                                  '
  &MDL2='    @MemDsc                                                  '
  &MDL3='-------------------------------------------------------------'
)END


When I start the Dialogue (the first panel it displays is this one) it errors saying &MDL1 has not been initialised:

Code:
ISPP316
, ,
Model line not defined  ,
The variable model line has not been initialized before the display.



Panel line where error was detected:
&MDL1


Can anyone see what I am doing wrong ?
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Willy Jensen

Active Member


Joined: 01 Sep 2015
Posts: 569
Location: Denmark

PostPosted: Fri Dec 31, 2021 8:29 pm
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You haven't initialized the MDL1 (and supposedly neither MLD2 nor MDL3) before display. What you show in the panel is setting the variables in the PROC section, which runs after the display. You my try setting the variables in the INIT section, though I seem to remember that model lines must be defined prior to the TBDISPL command.
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WilliamDownie

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Joined: 01 Jul 2020
Posts: 20
Location: UK

PostPosted: Fri Dec 31, 2021 9:12 pm
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Thanks Willy, that was the problem. What I have done is to initialise the variable model lines in my dialogue code, before doing the "DISPLAY PANEL(xxxxxx)".
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Pedro

Global Moderator


Joined: 01 Sep 2006
Posts: 2335
Location: Silicon Valley

PostPosted: Thu Jan 06, 2022 12:37 am
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The sections of the panel )BODY, )INIT, and )PROC have to occur in that order in the panel member. But you should think of it that they are executed in this order:

Code:

1. driving program code
2. )INIT section code
3. )BODY
4. )PROC section code
5. more driving program code
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