[Flag,List] = isnan(M,'parameters')
[Flag,List] = isnan(M,'sstate')
[Flag,List] = isnan(M,'derivatives')
[Flag,List] = isnan(M,'solution')
M [ model ] - Model object.Flag [ true | false ] - True if at least one NaN value exists in the queried category.
List [ cellstr ] - List of parameters (if called with 'parameters') or variables (if called with 'sstate') that are assigned NaN in at least one parameterisation, or equations (if called with 'derivatives') that produce an NaN derivative in at least one parameterisation.