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==== Error Message (AREV Specific) ====
=== At 16 AUG 2000 08:55:38AM Lee Fong Lun wrote: ===
 
{{tag>"AREV Specific"}}
 
<QUOTE>
I am using Advanced Revelation verion 3. I was running a program and an error message ERRMSG27.4 came out.  I was trying to find the cause of the message and unable to find out what causes it.  What is this message means ?? What is the problem ?? I hope I can get some help here.  Thank you.
</QUOTE>
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=== At 16 AUG 2000 10:04AM [url=http://www.sprezzatura.com" onMouseOver=window.status=Click here to visit our web site?';return(true)]The Sprezzatura Group[/url] wrote:  ===

<QUOTE>This means that there are too many programs on the program stack. Try to use less {} references in your code as each dictionary item counts as a program.





[url=http://www.sprezzatura.com" ]The Sprezzatura Group[/url]

[i]World Leaders in all things RevSoft[/i]

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</QUOTE>

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=== At 18 AUG 2000 01:37AM Lee Fong Lun wrote:  ===

<QUOTE>Thanks for the reply.  But what is a program stack ?? Is it when I run a program, the program will be placed in the stack ?? 



I have Advaned Revelation version 3 installed in a Novell server.  And I run programs form a few workstations.  It that mean all the programs that I run from different workstations are placed in the same program stack ?? Although they are running the same program ??

</QUOTE>

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=== At 18 AUG 2000 09:19AM Don Miller - C3 Inc. wrote:  ===

<QUOTE>Lee ..

It doesn't matter what network you're using.  Each instance of the program maintains its own local program stack in memory.  It works roughly as follows:

1.  Every Call (direct or indirect) inside a program uses an entry in the program stack.  The current program is suspended, it's variables, etc. are saved and control transfers to the call.  It doesn't matter whether it is a subroutine or a function.  The problem can be aggrevated in indirect dictionary symbolics.  So, for example if your program uses tempfield={SYMBOLIC_FIELD}, a stack entry will be used.  If inside {SYMBOLIC_FIELD} you do something like:

  a={Symbolic_1}

  b={Symbolic_2}

  c=XLATE("filename",{SOMEFIELD},"FIELDNAME",'X')

  note that this uses 2 stack entries + 1 for the XLATE ...

  ...

  @ams=somecalc

then the call inside your program to {SYMBOLIC_FIELD} will use a lot more program stack space than you might think.  This can be exacerbated if this kind of thing is being done inside a called subroutine that is not declared as expendable.  The stack variables will stay around until the main program terminates.



HTH

Don Miller

C3 Inc.

</QUOTE>


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