I am unable to name a variable with a subscript

[trip12345]

I am trying to solve a system of equations but I have 3 knowns. When I try to define the knowns, if I use a subscript, I get the error message:

"these units are not compatible"

or:

"the variable is undefined. Check that the label is set correctly."

I've defined variables and knowns with subscripts before and I don't know what I am doing wrong. Thanks for the help.

PS: This is a continuing post from an earlier problem and I keep on running into new and exciting problems 🙂

[ValeryOchkov]

[trip12345]

Thanks for the hotkey.

[VipulT · Accepted solution]

Hello @trip12345

The subscript that you have used is index operator.

For more information please click here 

And for name definition we need to use literal subscript.You use literal subscripts for naming purposes only. The literal subscript works in math regions only and not in text regions.

You can find more information in help center kindly click here

So by using literal subscript you would not face the issue.

[trip12345]

@VipulT Thank you very much for the simple answer. I knew I was doing something very easy and I thought there were shortcut keys to do subscript but I didn't realize I was identifying a index operator. Kudos.