Aspen Plus variables access through Active X

I am trying to access stream results of Aspen Plus simulation through active x but can't access the fields within the results tables although the variables call is available on the 'variable explorer'. My access method is:

Aspen.Tree.FindNode("\Data\Results Summary\Stream-Sum\Stream-Sum\Table")

i get an interface object which contains a 'elements' field which is also an interface object. However, the findnode function doesn't work on that COM object.

I found a python code on "kitchingroup" under aspen tag that shows how to access all the variables:

import os
import win32com.client as win32
aspen = win32.Dispatch('Apwn.Document')
aspen.InitFromArchive2(os.path.abspath('data\Flash_Example.bkp'))

def print_elements(obj, level=0):
    if hasattr(obj, 'Elements'):
        print ' '*level + obj.Name
        for o in obj.Elements:
            print_elements(o, level + 1)
    else:
        print ' '*level, obj.Name, ' = ', obj.Value

print_elements(aspen.Tree)

aspen.Close

can somebody provide a MATLAB equivalent for this code? the AI translated code didn't work.

Answer 1

[Sivsankar]

Hi Muhammed,

To access the stream results of an Aspen Plus simulation using ActiveX in MATLAB, you'll need to use COM automation like the Python script you provided.

There is a file exchange that helps to outline the Aspen Plus and Matlab connection through COM Technology. Leverage the following file exchange from below:

https://www.mathworks.com/matlabcentral/fileexchange/69464-aspen-plus-matlab-link

I believe that the MATLAB file provided in the file exchange has the python equivalent of your code.

Hope this helps!

[Muhammad Tauha Ali]

Hi,

Thanks for taking the time to reply. However, the question still remains about a way to do accomplish a sort of recursion on COM objects as demonstrated in the Python code.

I am already using COM/ActiveX interface for establishing Aspen Plus-MATLAB link as you identified. The problem is that i can't access the output streams table data, as an example, as it is one or two levels down in the COM objects hierarchy.