diff --git a/esds/helpers/platform.py b/esds/helpers/platform.py
index 5367846..ec776ab 100644
--- a/esds/helpers/platform.py
+++ b/esds/helpers/platform.py
@@ -70,6 +70,8 @@ class YAMLPlatformFile:
         else:
             self.parsing_error("platform file has no interfaces section")
 
+        print(self.default)
+
     def parsing_error(self,msg):
         raise Exception("Fail to parse platform file \""+self.file_path+"\": "+msg)
 
@@ -81,17 +83,11 @@ class YAMLPlatformFile:
                 UnitsParser.bandwidth(words[1]),
                 UnitsParser.latency(words[2]),
                 UnitsParser.range(words[3],self.default["node_count"])))
-        elif len(words) == 2:
-            return((
-                range(0,self.default["node_count"]),
-                UnitsParser.bandwidth(words[0]),
-                UnitsParser.latency(words[1]),
-                range(0,self.default["node_count"])))
-        return(None)
+        self.parsing_error("Invalide link \""+link+"\"")
 
     def parse_txperf(self,txperf):
         elts=txperf.split()
-        return((UnitsParser.bandwidth(elts[0]),UnitsParser.latency(elts[1])))
+        return((UnitsParser.range(elts[0],self.default["node_count"]),UnitsParser.bandwidth(elts[1]),UnitsParser.latency(elts[2])))
 
     def parse_interfaces(self):
         interfaces=self.platform["interfaces"]
@@ -116,11 +112,11 @@ class YAMLPlatformFile:
             ##### Set txperfs for wireless interfaces
             if not is_wired:
                 txperfs=interfaces[i]["txperfs"]
-                for node in range(0,node_count):
-                    txperf=txperfs[0] if len(txperfs) == 1 else txperfs[node]
-                    bw,lat=self.parse_txperf(txperf)
-                    BW[node][node]=bw
-                    LAT[node][node]=lat
+                for txperf in txperfs:
+                    p=self.parse_txperf(txperf)
+                    for node in p[0]:
+                        BW[node][node]=p[1]
+                        LAT[node][node]=p[2]
 
             self.default["interfaces"][i]={
                 "is_wired": is_wired,
@@ -137,13 +133,18 @@ class YAMLPlatformFile:
         if "implementations" in nodes:
             if type(nodes["implementations"]) != list:
                 self.parsing_error("nodes implementations should be a list of file path")
-            for file in nodes["implementations"]:
+            self.default["implementations"]=[None]*self.default["node_count"]
+            for impl in nodes["implementations"]:
+                words=impl.split()
+                r=UnitsParser.range(words[0],self.default["node_count"])
+                file="".join(words[1:])
                 if not os.path.exists(file):
                     self.parsing_error("File "+file+ " not found")
                 path, extension = os.path.splitext(file)
                 if extension != ".py":
                     self.parsing_error("File "+file+" must be a python file")
-                self.default["implementations"].append(path)
+                for node in r:
+                    self.default["implementations"][node]=file
             count = len(nodes["implementations"])
             if count > 1 and count != self.default["node_count"]:
                 self.parsing_error("If more than one implementation is specified, each node implementation should be provided ("+str(self.default["node_count"])+" in total)")
diff --git a/example/platform.yaml b/example/platform.yaml
index e122317..62db585 100644
--- a/example/platform.yaml
+++ b/example/platform.yaml
@@ -7,7 +7,7 @@ general:
 nodes:
     count: 5
     implementations:
-        - sender.py
+        - all sender.py
 
 interfaces:
     wlan0:
@@ -15,7 +15,7 @@ interfaces:
         links:
             - 0 1Bps 10s 0 
         txperfs:
-            - 1Bps 10s
+            - all 1Bps 10s
     eth0:
         wireless: no
-        links: 5Mbps 10s
\ No newline at end of file
+        links: all 5Mbps 10s all
\ No newline at end of file