Yes, I'm referring to ^XTER. Just type ^L to get a list of variables,
and you will see (among other things) a stack trace.
--- Nancy Anthracite <[EMAIL PROTECTED]> wrote:
> Frankly, I am very glad I asked this question because it is revealing
> of more
> than just my ignorance.
>
> How do you dump the stack? And the error trap your refer to is the
> one seen in
> D ^XTER?
>
> On Wednesday 25 May 2005 10:23 am, Greg Woodhouse wrote:
> > FWIW, I think you (Nancy) did a pretty good job of picking up on
> the
> > relevant details. It might be useful to think of it this way:
> Kernel
> > keeps track of session specific state (such as characteristics of
> the
> > current output device) using various standard variables in the
> process
> > symbol table. Particularly "famous" variables include DUZ (who's
> signed
> > in) and the IO* variables. In this case, the issue with IOSL was
> > secondary (having to do with checking to see if the error message
> will
> > fit on the current screen/page). A good technique (if the error is
> > logged in the error trap) is to look at the stack dump, so that you
> can
> > trace your way back to the ultimate source of the trouble.
> >
> > --- [EMAIL PROTECTED] wrote:
> > > > I would like to know how to chase this down for future
> reference.
> > >
> > > Am I on the
> > >
> > > > right track and now what? How do I find out more about IOSL?
> > > >
> > > > This is what I did so far:
> > > >
> > > > I found the 32nd line after the tag WR in the routine DDSU.m.
> the
> > >
> > > line with
> > >
> > > > the WR tag is 126. The lines below are 149-159 and there were
> no
> > >
> > > line wraps
> > >
> > > > above to screw things up that I could see. It seems that WR+32
> is
> > >
> > > probably
> > >
> > > > line 157, so WR+32 must count the line with WR as 1, correct?
> > >
> > > Nancy, WR+32 is the line 32 lines later than WR. (WR counts as
> WR+0)
> > > to see the line directly, you can just type:
> > > MUMPS> WRITE $TEXT(WR+32^DDSU),!
> > > . X DDSID
> > >
> > > which explains the headache, since it is an Xecute command on the
> > > local
> > > variable DDSID (which gets changed at run-time). As you can see
> in
> > > your
> > > code fragment below, the variable IOSL
> (Input-Output-Screen-Length)
> > > is
> > > only referenced on line WR+31 if the variable DDS is defined,
> either
> > > with
> > > sub-nodes, or a value itself. $D(DDS)= 1 , 10 or 11 (Self,
> > > SubnodesOnly,
> > > Self+Subnodes)
> > >
> > > This kind of problem is hard to debug, since it depends on the
> > > late-bound
> > > value of a variable. Usually, the only way to find out the
> problem
> > > is to
> > > use the ZWRITE DDSID command immediately after you see the error.
> > >
> > > > W DDH(A0,A4)
> > > > I $D(DDH("ID")) D S:$D(DUOUT) DIY=U
> > > > . N DDD,DIY,DDSID
> > > > . S DDSID=DDH("ID")
> > > > . S:$D(DDH("ID",1))#2 DDSID(1)=DDH("ID",1)
> > > > . N DDH
> > > > . S:$D(DDSID(1))#2 DDH("ID",1)=DDSID(1) K DDSID(1)
> > > > . S Y=A4
> > > > . S:$D(DDS) DDQ=$S(DY>(IOSL-1):IOSL-1,1:DY)_U_$X
> > > > . X DDSID
> > > > Q
> > > >
> > > >
> > > > IOSL is not newed and is used early in the routine,and gives me
> a
> > >
> > > value, so I
> > >
> > > > assume it is the undefined global variable. This is immediately
> > >
> > > after I
> > >
> > > > started up with D P^DI, which I think wipes the local
> variables,
> > >
> > > correct?
> > >
> > > > GTM>W IOSL
> > > > 24
> > > >
> > > > I asked for that section in the global, I think.
> > > >
> > > > GTM>ZWR ^DD(200.07475,.01,0)
> > > > ^DD(200.07475,.01,0)="CERTIFICATION^MP747.9'^QA(747.9,^0;1^Q"
> > > >
> > > > Then I looked in the Data Dictionary:
> > > >
> > > > ******************
> > > > Select OPTION: 8 DATA DICTIONARY UTILITIES
> > > > Select DATA DICTIONARY UTILITY OPTION: ^
> > > > Select OPTION: ^
> > > > GTM>D Q^DI
> > > > VA FileMan 22.0
> > > > Select OPTION: 8 DATA DICTIONARY UTILITIES
> > > > Select DATA DICTIONARY UTILITY OPTION: 1 LIST FILE ATTRIBUTES
> > > > START WITH WHAT FILE: NEW PERSON//
> > > > GO TO WHAT FILE: NEW PERSON//
> > > > Select SUB-FILE:
> > > > Select LISTING FORMAT: STANDARD//
> > > > Start with field: FIRST// Certification
> > > > Go to field:
> > > > DEVICE: TELNET
> > > > STANDARD DATA DICTIONARY #200 -- NEW PERSON FILE
> > > > MAY
> > >
> > > 25,[EMAIL PROTECTED]:04:05 PAGE
> > >
> > > > 1
> > > > STORED IN ^VA(200, (1154 ENTRIES) SITE: CAMP MASTER UCI:
> > >
> > > VAH,ROU (VERSION
> > >
> > > > 8.0)
> > > >
> > > > DATA NAME GLOBAL DATA
> > > > ELEMENT TITLE LOCATION TYPE
> >
> >
>
---------------------------------------------------------------------------
> >----
> >
> > > > 200,747.5 CERTIFICATION QAR2;0 POINTER Multiple
> > >
> > > #200.07475
> > >
> > > > DESCRIPTION: This field allows you to enter
> > >
> > > specialties in
> > >
> > > > which the practitioner is Board
> > >
> > > Certified.
> > >
> > > > 200.07475,.01 CERTIFICATION 0;1 POINTER ** TO AN
> > >
> > > UNDEFINED FILE **
> > >
> > > > (Multiply asked)
> > > > LAST EDITED: FEB 01, 1991
> > > > HELP-PROMPT: Enter the specialties in
> which
> > >
> > > the
> > >
> > > > practitioner is Board
> Certified.
> > > > DESCRIPTION: This field allows you to
> enter
> > >
> > > specialties
> > >
> > > > in
> > > > which the practitioner is
> Board
> > >
> > > Certified.
> > >
> > > > CROSS-REFERENCE: 200.07475^B
> > > > 1)= S ^VA(200,DA(1),"QAR2","B",
> > > > $E(X,1,30),DA)="
> > > > "
> > > > 2)= K
> > >
> > > ^VA(200,DA(1),"QAR2","B",$E(X,1,30),DA)
> > >
> > > > 200.07475,1 DATE 0;2 DATE
> > > >
> > > > INPUT TRANSFORM:S %DT="E" D IN^QARVER1,^%DT S
> X=Y
> > >
> > > K:Y<1 X
> > >
> > > > NOTES: XXXX--CAN'T BE ALTERED EXCEPT
> BY
> > >
> > > PROGRAMMER
> > >
> > > > ************************
> > > >
> > > > On Wednesday 25 May 2005 05:15 am, Usha wrote:
> > > > > Hi
> > > > >
> > > > >
> > > > >
> > > > > While listing the fields of NEW PERSON file from FileMan, the
> > >
> > > following is
> > >
> > > > > displayed
> > > > >
> > > > >
> > > > >
> > > > > 747.5 CERTIFICATION%GTM-E-GVUNDEF, Global variable
> > >
> > > undefined:
> > > > > ^DD(200.07475,.01,0)
> > > > >
> > > > > At M source location WR+32^DDSU
> > > > >
> > > > >
> > > > >
> > > > > Can anyone help?
> > > > >
> > > > >
> > > > >
> > > > > Regards
> > > > >
> > > > > Usha
> > > >
> > > > --
> > > > Nancy Anthracite
> > > >
> > > >
> > > > -------------------------------------------------------
> > > > This SF.Net email is sponsored by Yahoo.
> > > > Introducing Yahoo! Search Developer Network - Create apps using
> > >
> > > Yahoo!
> > >
> > > > Search APIs Find out how you can build Yahoo! directly into
> your
> > >
> > > own
> > >
> > > > Applications - visit
> > >
> > > http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005
> > >
> > > > _______________________________________________
> > > > Hardhats-members mailing list
> > > > Hardhats-members@lists.sourceforge.net
> > > > https://lists.sourceforge.net/lists/listinfo/hardhats-members
> > >
> > > -------------------------------------------------------
> > > SF.Net email is sponsored by: GoToMeeting - the easiest way to
> > > collaborate
> > > online with coworkers and clients while avoiding the high cost of
> > > travel and
> > > communications. There is no equipment to buy and you can meet as
> > > often as
> > > you want. Try it
> > > free.http://ads.osdn.com/?ad_id=7402&alloc_id=16135&op=click
> > > _______________________________________________
> > > Hardhats-members mailing list
> > > Hardhats-members@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/hardhats-members
> >
> > A practical man is a man who practices the errors of his
> forefathers.
> > --Benjamin Disraeli ====
> > Greg Woodhouse
> > [EMAIL PROTECTED]
> > [EMAIL PROTECTED]
> >
> >
> >
> >
> >
> > -------------------------------------------------------
> > SF.Net email is sponsored by: GoToMeeting - the easiest way to
> collaborate
> > online with coworkers and clients while avoiding the high cost of
> travel
> > and communications. There is no equipment to buy and you can meet
> as often
> > as you want. Try it
> > free.http://ads.osdn.com/?ad_id=7402&alloc_id=16135&op=click
> > _______________________________________________
> > Hardhats-members mailing list
> > Hardhats-members@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/hardhats-members
>
> --
> Nancy Anthracite
>
>
> -------------------------------------------------------
> SF.Net email is sponsored by: GoToMeeting - the easiest way to
> collaborate
> online with coworkers and clients while avoiding the high cost of
> travel and
> communications. There is no equipment to buy and you can meet as
> often as
> you want. Try it
> free.http://ads.osdn.com/?ad_id=7402&alloc_id=16135&op=click
> _______________________________________________
> Hardhats-members mailing list
> Hardhats-members@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/hardhats-members
>
A practical man is a man who practices the errors of his forefathers.
--Benjamin Disraeli
====
Greg Woodhouse
[EMAIL PROTECTED]
[EMAIL PROTECTED]
-------------------------------------------------------
SF.Net email is sponsored by: GoToMeeting - the easiest way to collaborate
online with coworkers and clients while avoiding the high cost of travel and
communications. There is no equipment to buy and you can meet as often as
you want. Try it free.http://ads.osdn.com/?ad_id=7402&alloc_id=16135&op=click
_______________________________________________
Hardhats-members mailing list
Hardhats-members@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/hardhats-members
