MATLAB Cantera helium problem

I'm currently using MATLAB to produce a thermodynamic model of a rocket engine, using Cantera built in, to support the thermodynamic functions and properties, however the cycle I'm analysing uses a helium power loop, and I can't seem to find a way of using helium inside of cantera. Is there a way to use this, as I need to calculate enthalpies and temperatures of the helium in order to balance the overall loop, I've looked on the cantera website under the element section however this code doesn't work on my command window.

[dpb]

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