diff --git a/server/include/hist.h b/server/include/hist.h
index 157ce2482..59a16e131 100644
--- a/server/include/hist.h
+++ b/server/include/hist.h
@@ -7,6 +7,8 @@
 #ifndef _HIST_H_
 #define _HIST_H_
 
+#include <stdio.h>
+
 #define HIST_HEIGHT	50
 #define HIST_SEQ	17
 
@@ -68,7 +70,10 @@ void hist_print(struct hist *h);
 /** Print ASCII style plot of histogram */
 void hist_plot(struct hist *h);
 
-/** Dump histogram data in Matlab format to stdout */
-void hist_dump(struct hist *h);
+/** Dump histogram data in Matlab format to buf */
+void hist_dump(struct hist *h, char *buf, int len);
+
+/** Prints Matlab struct containing all infos to file. */
+void hist_matlab(struct hist *h, FILE *f);
 
 #endif /* _HIST_H_ */
\ No newline at end of file
diff --git a/server/src/hist.c b/server/src/hist.c
index ef2d937c9..742e11be2 100644
--- a/server/src/hist.c
+++ b/server/src/hist.c
@@ -9,6 +9,7 @@
 #include <limits.h>
 #include <float.h>
 #include <math.h>
+#include <time.h>
 
 #include "utils.h"
 #include "hist.h"
@@ -102,7 +103,11 @@ void hist_print(struct hist *h)
 	info("Standard derivation: %f", hist_stddev(h));
 		
 	hist_plot(h);
-	hist_dump(h);
+	
+	char buf[h->length * 8];
+	hist_dump(h, buf, sizeof(buf));
+	
+	info("hist = %s", buf);
 }
 
 void hist_plot(struct hist *h)
@@ -122,27 +127,43 @@ void hist_plot(struct hist *h)
 	memset(buf, '#', HIST_HEIGHT);
 
 	/* Print plot */
-	info("%5s | %5s | %s", "Value", "Occur", "Histogram Plot:");
+	info("%9s | %5s | %s", "Value", "Occur", "Histogram Plot:");
 	for (int i = 0; i < h->length; i++) {
 		int bar = HIST_HEIGHT * ((double) h->data[i] / max);
 
-		if      (h->data[i] == min) info("%5.2e | " GRN("%5u") " | %.*s", VAL(h, i), h->data[i], bar, buf);
-		else if (h->data[i] == max) info("%5.2e | " RED("%5u") " | %.*s", VAL(h, i), h->data[i], bar, buf);
-		else			    info("%5.2e | "     "%5u"  " | %.*s", VAL(h, i), h->data[i], bar, buf);
+		if      (h->data[i] == min) info("%+5.2e | " GRN("%5u") " | %.*s", VAL(h, i), h->data[i], bar, buf);
+		else if (h->data[i] == max) info("%+5.2e | " RED("%5u") " | %.*s", VAL(h, i), h->data[i], bar, buf);
+		else			    info("%+5.2e | "     "%5u"  " | %.*s", VAL(h, i), h->data[i], bar, buf);
 	}
 }
 
-void hist_dump(struct hist *h)
+void hist_dump(struct hist *h, char *buf, int len)
 {
 	char tok[8];
-	char buf[h->length * sizeof(tok)];
-	memset(buf, 0, sizeof(buf));
+	memset(buf, 0, len);
+
+	strncat(buf, "[ ", len);
 
-	/* Print in Matlab vector format */
 	for (int i = 0; i < h->length; i++) {
 		snprintf(tok, sizeof(tok), "%u ", h->data[i]);
-		strncat(buf, tok, sizeof(buf) - strlen(buf));
+		strncat(buf, tok, len - strlen(buf));
 	}
-
-	info("hist = [ %s]", buf);
+	
+	strncat(buf, "]", len - strlen(buf));
+}
+
+void hist_matlab(struct hist *h, FILE *f)
+{
+	char buf[h->length * 8];
+	hist_dump(h, buf, sizeof(buf));
+	
+	fprintf(f, "%lu = struct( ", time(NULL));
+	fprintf(f, "'min', %f, 'max', %f, ", h->low, h->high);
+	fprintf(f, "'ok', %u, too_high', %u, 'too_low', %u, ", h->total, h->higher, h->lower);
+	fprintf(f, "'highest', %f, 'lowest', %f, ", h->highest, h->lowest);
+	fprintf(f, "'mean', %f, ", hist_mean(h));
+	fprintf(f, "'var', %f, ", hist_var(h));
+	fprintf(f, "'stddev', %f, ", hist_stddev(h));
+	fprintf(f, "'hist', %s ", buf);
+	fprintf(f, "),\n");
 }
diff --git a/server/src/node.c b/server/src/node.c
index afd02ea41..003ebf66f 100644
--- a/server/src/node.c
+++ b/server/src/node.c
@@ -58,7 +58,8 @@ struct node_vtable const * node_lookup_vtable(const char *str)
 
 int node_start(struct node *n)
 {
-	int ret;
+	if (!n->refcnt)
+		return -1;
 
 	char str[256];
 	node_print(n, str, sizeof(str));
@@ -66,13 +67,8 @@ int node_start(struct node *n)
 	debug(1, "Starting node '%s' of type '%s' (%s)", n->name, n->vt->name, str);
 
 	{ INDENT
-		if (!n->refcnt)
-			warn("Node '%s' is not used by an active path", n->name);
-
-		ret = n->vt->open(n);
+		return n->vt->open(n);
 	}
-	
-	return ret;
 }
 
 int node_start_defer(struct node *n)
diff --git a/server/src/test.c b/server/src/test.c
index 107290d70..fa31b122a 100644
--- a/server/src/test.c
+++ b/server/src/test.c
@@ -13,6 +13,9 @@
 #include <limits.h>
 #include <arpa/inet.h>
 #include <netdb.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 
 #include "config.h"
 #include "cfg.h"
@@ -189,5 +192,13 @@ void test_rtt() {
 
 	hist_print(&histogram);
 	
+	struct stat st;
+	if (!fstat(fd, &st)) {
+		FILE *f = fdopen(fd, "w");
+		hist_matlab(&histogram, f);
+	}
+	else
+		error("Invalid file descriptor: %u", fd);
+	
 	hist_free(&histogram);
 }