I'm trying to use Cantera function on matlab but it gives me back the same error:

gas = IdealGasMix('gri30.yaml')

Warning: The function IdealGasMix is deprecated and will be removed after Cantera

2.5. Please use Solution as a replacement.

> In IdealGasMix (line 52)

Error using ThermoPhase (line 23)

***********************************************************************

XML_NoChild:

Error in XML file '' at line 0.

The XML Node <--> does not contain a required child node named <thermo>.

Existing children are named:

***********************************************************************

Error in Solution (line 50)

t = ThermoPhase(src, id);

Error in IdealGasMix (line 61)

s = Solution(infile);

Answer 1

[BhaTTa]

Hey , I have noticed that the errors mention a deprecated function and a missing XML node. Based on that, here are a couple of things we could try:

1. Update the Function:

• It seems like the function IdealGasMix is no longer recommended in Cantera. Would you be open to switching to the Solution function instead? It's designed to be a more reliable and up-to-date option for loading thermodynamic data.

2. Check the YAML File:

• The second error points to a missing <thermo> node in the gri30.yaml file. It's crucial for defining thermodynamic properties. Would you mind double-checking the file path to ensure it's correct and that the file itself is a valid YAML file with the necessary node? If there's any chance it's corrupt or incomplete, we could try obtaining a fresh copy.

3. Update to Solution class:

• Since IdealGasMix is deprecated, consider updating your code to use the Solution class instead. You can initialize it with the YAML file directly. Here's an example:

Corrected code

gas = Solution('gri30.yaml'); % Use the recommended function