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For loop bug

#5636  Permalink Top

For loop bug

Mar-14-15 01:06:59

ForLoopBug.mo
Hello,

If I'm not very mistaken this should just run:

model ForLoopBug
  parameter Integer N = 1;
  parameter Real p_in = 2e5;
  Real[N + 1] p;
  Real[N] dp;
algorithm
  p[1] := p_in;
  for i in 1:N loop
    dp[i] := 10;
    p[i + 1] := p[i] - dp[i];
  end for;
end ForLoopBug;

Edited by: Arne - Mar-14-15 01:07:31
Attachments:
#5637  Permalink Top

Re: For loop bug

Mar-14-15 01:21:16

Thanks for reporting this. I added a bug ticket about it:
https://trac.openmodelica.org/OpenModelica/ticket/3220

As a workaround for now until we fix it you can use equation instead of algorithm ( and replace := with = ).

Cheers,
Adrian Pop/

Edited by: adrpo - Mar-14-15 01:21:36
#5643  Permalink Top

Re: For loop bug

Mar-14-15 03:19:23


TestForLoop.mo
Sorry to bother your tennis game again... ;-)

If I 'wrap' the working code into a function and then call this function from the model than it does run as it should.

Attachments:
#5644  Permalink Top

Re: For loop bug

Mar-14-15 03:22:47

No problem.

Yes, if you put it in a function then is treated differently and it works.
In a model algorithm section we need to find the inputs and outputs of the algorithm,
sort the statements as we do with equations, etc. and it seems there is an error in
that handling.

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