diff --git a/splitRDI b/splitRDI
new file mode 100755
--- /dev/null
+++ b/splitRDI
@@ -0,0 +1,64 @@
+#!/usr/bin/perl
+#======================================================================
+#                    S P L I T R D I 
+#                    doc: Sat Aug 21 22:20:27 2010
+#                    dlm: Sat Aug 21 23:18:41 2010
+#                    (c) 2010 A.M. Thurnherr
+#                    uE-Info: 51 44 NIL 0 0 72 2 2 4 NIL ofnI
+#======================================================================
+
+# split RDI files based on list of ensemble numbers (e.g. from yoyo -t)
+
+# HISTORY:
+#	Aug 21, 2010: - created
+
+# NOTES:
+#	- it is assumed that the input file begins with ensemble #1
+#	- input file extension 000 is assumed
+#	- turning-point ensembles are written to preceding profile,
+#	  for compatibility with [yoyo]
+
+$0 =~ m{(.*/)[^/]+};
+require "$1RDI_BB_Read.pl";
+use Getopt::Std;
+
+die("Usage: $0 " .
+	"[out-file -b)asename <bn>] " .
+	"[out-file -n) <digits>] " .
+	"<RDI file> <ens> <ens[...]>\n")
+		unless (&getopts('b:n:') && @ARGV>=3);
+
+chomp($opt_b = `basename $ARGV[0] .000`)		# basename
+	unless defined($opt_b);
+$opt_n = 2										# number of digits in profile #
+	unless defined($opt_n);
+		
+readHeader($ARGV[0],\%hdr); shift;				# get length of ensembles
+$ens_len = $hdr{ENSEMBLE_BYTES} + 2;
+
+$first_ens = $ARGV[0]+1; shift;					# initialize loop
+$last_ens  = $ARGV[0]; shift;
+$cnr = 0;
+
+do {											# split data
+	sysseek(WBRF,($first_ens-2)*$ens_len,0) ||
+		die("$WBRcfn: $!");
+	$last_ens++ unless defined($ARGV[0]);
+	$nBytes = ($last_ens-$first_ens+1) * $ens_len;
+	sysread(WBRF,$buf,$nBytes) == $nBytes ||
+		die("$WBRcfn: file truncated");
+
+	$fn = $opt_b . sprintf("_%0${opt_n}d.000",$cnr++);
+	open(F,">$fn") || die("$fn: $!\n");
+	syswrite(F,$buf,$nBytes) == $nBytes ||
+		die("$fn: $!\n");
+	close(F);
+	printf(STDERR "$fn: %d ensembles ($nBytes bytes)\n",$last_ens-$first_ens+1);
+	
+	$first_ens = $last_ens+1;
+	$last_ens  = $ARGV[0]; shift;
+} while defined($last_ens);
+
+exit(0);
+
+