build error in x2susitmx

Error in 4.2.8~dev1 building x2susitmx (and others)

/opt/rtcds/rtbuild/rcg-4.2.8~dev1/src/fe/x2susitmx/x2susitmx.c:4299:40: error: subscripted
value is neither array nor pointer nor vector                                             
 itmx_l1_demux5[7]= itmx_bio_l1_demux[1][7];
                                        ^