my $MPI_Str = FilterMetaChars($in{'MPI'});
my $MPI = 0;
-$MPI = 1 if ($MPI_Str eq "yes");
+$MPI = 1 if ($MPI_Str eq "yes" && $::mpi_enable ne "");
$error .= "IR Nx and Ny must be between 5 and 1024<br>" if ($IR_Nx < 5 || $IR_Nx > 1024 || $IR_Ny < 5 || $IR_Ny > 1024);
$error .= "IR Filter Parameter must be between 0 and 1<br>" if ($IR_Filter_Param < 0 || $IR_Filter_Param > 1);