Multi linear regressoin with categorical variables

I want to run a multivariate linear regression with categorical variables.

My coding for mono with categorical works, as does multi with not categorical variables. I'm trying to figure out what the problem is!

% Doesn't work, needs fixing - Multivariate with categorical variables
mdllinallscenarioparams = fitlm(scenario{:,scenarioparams(4:5)},scenario.mean_benefitpercent,'CategoricalVars',[1:2],'VarNames',{'intgsystem','V2G','mean_benefitpercent'});

% Works, mono with categorical
mdllinallscenarioparams = fitlm(scenario{:,scenarioparams(4)},scenario.mean_benefitpercent,'CategoricalVars',[1],'VarNames',{'intgsystem','mean_benefitpercent'});

% Works, multi with not categorical
mdllinallscenarioparams = fitlm(scenario{:,scenarioparams(12:13)},scenario.mean_benefitpercent,'CategoricalVars',[1:2],'VarNames',{'PV','ESS','mean_benefitpercent'});

[Aditya Patil]

Can you provide more information, such as the complete code and the error that you are receiving?