The input to the CAN Unpack block, if you are sending it a bus, must be a non-virtual bus with the following structure
{ ... 'CAN_MESSAGE_BUS', ... '', ... '', ... 'Auto', ... '-1', ... '0', {... {'Extended', 1, 'uint8', 'real', 'Sample', 'Fixed', [], [], '', ''}; ... {'Length', 1, 'uint8', 'real', 'Sample', 'Fixed', [], [], '', ''}; ... {'Remote', 1, 'uint8', 'real', 'Sample', 'Fixed', [], [], '', ''}; ... {'Error', 1, 'uint8', 'real', 'Sample', 'Fixed', [], [], '', ''}; ... {'ID', 1, 'uint32', 'real', 'Sample', 'Fixed', [], [], '', ''}; ... {'Timestamp', 1, 'double', 'real', 'Sample', 'Fixed', [], [], '', ''}; ... {'Data', 8, 'uint8', 'real', 'Sample', 'Fixed', [], [], '', ''}; ... } ... } ...