Sequence classes do not inherit from any other VB API classes. Therefore, you cannot use sequence objects as arguments where any other type of VB API object is expected, including other types of sequences. For example, if you have a list of IpfcModelItems that happen to be features, you cannot use the sequence as if it were a sequence of IpfcFeatures.

To construct the array of features, you must insert each member of the IpfcModelItems list into the new IpfcFeatures list.