How can I link Aspen plus and matlab

Dear,

Is there any one can help me on the code that already shared about Aspen plus - MATLAB link? Since I can get access to Aspen plus V10, so I tried to link MATLAB with Aspen plus V8.8.

But when i run the code---a slightly change compared to the original code (Version and file name). Instead of running 'Reactive_Distillation.bkp', I run the file 'ETHANOLColumn_v8.8.bkp' shared for the optimisation in Aspen and MATLAB.

%% Example of Application

Reflux_Ratio = [1, 3, 5, 7];

for i = 1:length(Reflux_Ratio)

Aspen.Tree.FindNode("\Data\Blocks\T-101\Input\BASIS_RR").Value; % Column Reflux

It shows the error on the sentence 'Aspen.Tree.FindNode("\Data\Blocks\T-101\Input\BASIS_RR").Value; % Column Reflux'.

>> AspenPlus_Matlab_Link

Dot indexing is not supported for variables of this type.

Error in AspenPlus_Matlab_Link (line 17)

Aspen.Tree.FindNode("\Data\Blocks\T-101\Input\BASIS_RR").Value; % Column Reflux

Can anyone help me on this ? I can invoke the aspen file but when trying to do sensitivity analysis, the error shows on the input sentence.

Thank you so much!

Answer 1

[Mario Malic]

Bolded text might be the error. See the documentation on FindNode function.

Aspen.Tree.FindNode("\Data\Blocks\T-101\Input\BASIS_RR").Value

Here's a link that might be of use. https://stackoverflow.com/questions/51589733/avoid-syntax-error-using-hyphens-in-python

[wanrong wang]

Thank you so much. Mario.

After I check the code and the link you send, then I changed to (the bolded text)

'Reflux_Ratio = [1, 3, 5, 7];

for i = 1:length(Reflux_Ratio)

Aspen.Tree.FindNode("\Data\Blocks\T-101\Input\BASIS_RR").Value = Reflux_Ratio(i); % Column Reflux'

But it showed another error :

Unrecognized property 'FindNode' for class 'Interface.8E567522_F9BA_11CF_90B2_0000C0A810C4'.

Error in AspenPlus_Matlab_Link (line 17)

Aspen.Tree.FindNode("\Data\Blocks\T-101\Input\BASIS_RR").Value = Reflux_Ratio(i); % Column Reflux

I'm wondering if you know the reason why this error shows. I'm using MATLABR2019a.

Thanks!!!!

[Mario Malic]

I don't use this program, so I can't be of help.

Aspen.Tree.FindNode("\Data\Blocks\T-101\Input\BASIS_RR").Value;

This code is alright, MATLAB found something, but this BASIS_RR is probably not a structure, but maybe is just a variable.

Aspen.Tree.FindNode("\Data\Blocks\T-101\Input\BASIS_RR"); % try with this

[wanrong wang]

Thank you!! Mario. I will try this.

[Vincent Kroeze]

Hi,

It may sound weird, but i get the same error if I save my .bkp file on the wrong screen (page) (so properties instead of simulation). Which could make sense, as the FindNode routine indeed does not exist under properties.

Maybe it helps.

[wanrong wang]

Thank you so much. Vincent. So sorry for the late reply. I've solved the problem now.

[Yue Ming]

Hi,I have the same problem with "Unrecognized property 'FindNode' for class 'Interface.8E567522_F9BA_11CF_90B2_0000C0A810C4' as mentioned above.Can you tell me how it was solved？

[文玥]

Hi

I'm sorry to trouble you.I have the same problem with " "Unrecognized property 'FindNode' for class 'Interface.8E567522_F9BA_11CF_90B2_0000C0A810C4'as mentioned above.Is your problem solved?Can you tell me how it was solved？