final int row = S + H + missingSrcESI;
// replace line S + H + missingSrcESI with the line for encIndexes
Set<Integer> indexes = LinearSystem.encIndexes(Kprime, new Tuple(Kprime, repairISI));
A.clearRow(row); // must clear previous data first!
for (Integer col : indexes) {
A.set(row, col, (byte)1);
}
// fill in missing source symbols in D with the repair symbols