Enrico Remigi WEST Product Owner

Hi Iacopo,
let's take the sludge production (kg/d) as an example - whether you're using a flux of one of the blocks, or you've created a 'calculator variable' to compute it.
I see 3 options:
[list]
[li]if you're only interested in visualising (dynamically) the sludge production, you could use the [b]Current Value[/b] plot[/li]
[li]you could use the Time series Criterion called [b]Integral[/b] (in Analysis Properties) - and even set the interval (start- and stop time) that is to be used to compute the integral[/li]
[li]if you need more control over such cumulated variable, e.g. compute the daily sludge production, you need to implement the necessary equation(s) in MSL using the Model Editor[/li]
[/list]
For the latter, you may want to take a look at the periodic cost calculation.

But the only way to not encounter the error is by using the new fractionation layout that I attached to my previous post

See attachment

Hello Simone,
you uncovered an error in the fractionation model for ASM2dM.

I cannot attach xml files here so I have changed the extension of the corrected fractionation model to txt.
(not sure it actually works - if it doesn't I will send it to you via email)

Please replace the original .Input.Layout.xml in the InputOutput folder by this one (and change the extension back to xml); and step through the influent tool once again. I tested it and it should work.
Do not forget to add TP and ISS as Custom Components, as these are requested by the ASM2dM default fractionation model (see Models Guide)

Hi,
impossible to say: the error message in the dialog is far too generic.
Perhaps the Logging pane gives you more details?
A suggestion: have you [u]first[/u] created, compiled, run the model in ASM1; [u]then[/u] changed the instance to ASM2, correct? Did you modify the fractionation layout suitably, prior to regenerating the influent model?

It may be best you direct this to mikebydhi@dhigroup.com as it may take one or two iterations.
In fact, I would like to get your entire project folder - assuming you haven't used custom models, in which case we'd also need the library.

In the meantime: I see the "Influent - in" wizard is open, have you perhaps done anything in relation to the influent? E.g. adding/deleting/renaming one of the "custom" components, without adjusting the fractionation model and re-generating the model + influent file? just a thought ...

Another thing that may help: put the Logging pane on the foreground (dock it to the Layout); clear it first; then launch the steady-state simulation. You will see messages scrolling, until the first error message - which in turns will fire the error message pop-up. The message in the Logging may be a lot more informative and point you to the exact cause.

If you cannot figure this out, please contact MIKE.

Hi,
yes: please have a look at the User Manual, pages 108-111

Dear Chaim,
could you please pack the whole model library (BlockLib.xml + Models- & Icons folders), i.e. the WESTforKOSIM folder and send it to mikebydhi@dhigroup.com ?
I will take a look.
I recall having seen this type of error, a few versions back ...

Dear Chaim,
it looks like a certain (absolute) path is used in your library, within the base.msl file - so you musn't look at that specific line number, but inside the base.msl file that is referenced to at that line.
If you use the Include page of the Model Library Explorer, you would probably see a red "X" in place of that file - the image attached shows the Files page.
What file is actually missing?

If you say that the volumes become negative, this is precisely what the error message points at:
[quote author=astroneer link=topic=16094.msg20654#msg20654 date=1477402747]
[u]System error: Error [..] or evaluating lower and upper bounds.
[/u]
[/quote]
because the data type "Volume" is limited within the range [0 +INF].

The key now is to find out WHY does this occur: which quantity (or set of quantities) brings the volume below zero ?

Can you please send your project folder to the tech support (mikebydhi@dhigroup.com) ?