Checks control port data type and data port settings of multiport switches to heed rule jc_0630.
Note that this rule by its explicit definitions does neither allow for Index Vector, which are nothing but Multiport Switch blocks with the Number of data ports parameter set to forbidden value 1, nor working with enumerated signals to control Multiport Switch blocks as they are not an unsigned integer type themselves and usally (should) derive from signed type Simulink.IntEnumType.
The above described behaviour might be changed by setting a true value for parameter bAllowMpSwitchEnum for the control port data type or parameter bAllowMpSwitchVecIdx for a single but non-scalar data port respectively.
Exempted from the checks are all contents linked into the model from libraries listed in the jExclLibs parameter.