If the module you are importing has at least one combinational path (i.e.,
a change on any input can effect an output port without a clock event), you must
indicate this in the configuration M-function. SysgenBlockDescriptor
object provides a tagAsCombinational
method that
indicates your module has a combinational path. It should be invoked as follows in the
configuration M-function:
this_block.tagAsCombinational;