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I have successfully accessed many different Aspen Plus variables through COM interface using Python (win32com), but failed to do so for the following variable, using the same command.

AspenPlus.Tree.FindNode("\Data\Reactions\Reactions\ReactionABC\Input\RVALUE_LIST\#1").Value = 11

However, this exact same command worked well using Matlab. It appears that python failed to deal with "#". How to fix this? Any suggestion or help will be highly appreciated.

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I know it has been a while since you asked this question. But I have recently had a similar issue I worked by doing the following:

AspenPlus.Tree.FindNode(r"\Data\Reactions\Reactions\ReactionABC\Input\RVALUE_LIST\#1").Value = 11

By including the r before the string you tell win32com that the string literal is raw; if you don't do this it will interpret \#1 as a smiley face, which has no place in the Aspen Variable Tree.

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