In reply to Finto Antony.

Sorry about that. That feature was added in SAS/IML 12.3 (SAS 9.4). Replace the line
call qntl(SimEst, x, Quantile);
with
call qntl(SimEst, x, Quantile[2:nrow(Quantile)-1]);
SimEst = min(x) // SimEst // max(x);