TASK Add a Pipe (IL) (Isothermal Liquids > Elements) and a second Reservoir (IL) block. I Am Unable to Complete it, keep showing Error while submitting

Error : Does the following block value match the plotted requirement?

Pipe (IL): mdot_A

[Cris LaPierre]

Everything looks ok. Try resetting the task and redoing it. Hopefully that fixes it.

[Neil Desmond]

I'm getting the same problem; I suspect there's a bug in the setup.

[Neil Desmond]

[Neil Desmond]

Resetting task didn't help at all.

[Neil Desmond]

I'm using "MATLAB R2022a - trial use".

My system's hardware/OS properties:

64-bit operating system, x64-based processor

Windows 10 Home, version 21H1, OS build 19043.1110, Windows Feature Experience Pack 120.2212.3530.0

Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz

[Neil Desmond]

More details on version I have:

[Neil Desmond]

Restarting Windows did not help.

[Neil Desmond]

ETA? (I hope someone in the Matlab bunker's looking into this.)

[Shubham]

1. Resetting Task Doesn't Work.

2. Restarting Matlab Doesn't Work.

3. Tried Online Doesn't Work.

4. Restarted Windows, Doesn't Work !

[Walter Roberson]

In your top diagram, you do not have a Reservoir (IL) -- instead you have Reservoir (IL)1

[Cris LaPierre]

If you want to connect to someone at MathWorks, please use the Contact Us page. Answers is a community forum, and not an official MathWorks Support channel.

[Neil Desmond]

Hi Walter Roberson, that's an interesting catch, but as you can see from the image that I posted, I myself have the same problem with an (IL), not an (IL)1 or other # Reservoir.

I would guess 2 things are relevant:

1 - it probably doesn't matter to the Onramp course whether it's an (IL) or (IL)1 Reservoir; it seems the Assessment process only cares about the mdot_A vs Time results, because both my results and the OP results appear to have the same "incorrect" red dot patterns.

2 - it's possible that the original poster originally had an (IL) Reservoir instead of (IL)1 Reservoir and somehow ended up with an (IL)1 Reservoir after failed & frustrated attempts at trying to figure out what they're doing wrong, then posted an image of the current diagram rather than the problem in it's original form.

Of course I could be wrong about these guesses, but there does seem to be some sort of problem, and it's preventing me from being able to complete the course.

[Neil Desmond]

Hi Cris LaPierre - ok I'll give that a try; thanks.

[Asma Zahid]

Hi @Cris LaPierre,

In 6.4 Task 3- Simscape OnRamp, I'm facing issue in last step how I get the plotted requirement?. Please guide.

[Cris LaPierre]

Please ask this in a new question.

Answer 1

[Cris LaPierre]

I discovered this is a known issue. In the meantime, see this Answer for a workaround

https://www.mathworks.com/matlabcentral/answers/1670354-how-to-advance-on-task-3-of-multidomain-modeling-the-fluid-domain-in-simscape-onramp

In short, a default property in the Isothermal Liquid block has changed. Open the block properties and set the value of the Entrained Air > Volumetric fraction of entrained air property to zero.

[Asma Zahid]

@Cris LaPierre Kindy help me in Simscape OnRamp 6.4 task 3. Details mentioned in above comment.