Repaired popen syntax

__init__.py

@@ -62,10 +62,14 @@ class Measurements():
         '''
         Note: in the stub dumpwide I added /bin/bash, otherwise you get an Exec format error.
         '''
-        #self.measurement = subprocess.Popen(self.tool, self.centralFrequency, self.integrationTime, stdout=subprocess.PIPE)
-        self.measurement = subprocess.Popen(self.tool +" "+ str(self.centralFrequency) +" "+ str(self.integrationTime), shell=True, stdout=subprocess.PIPE)
-        measResults = self.measurement.stdout
-        
+        try:
+            self.measurement = subprocess.Popen(self.tool, self.integrationTime, stdout=subprocess.PIPE)
+            #self.measurement = subprocess.Popen(self.tool +" "+ str(self.centralFrequency) +" "+ str(self.integrationTime), shell=True, stdout=subprocess.PIPE)
+            measResults = self.measurement.stdout
+        except OSError as e:
+            raise OSError('Can not open command file: {},\
+                please check measurement.ini file'.format(self.tool))
+                    
         """ Write results into file"""
         for line in measResults:
             self.outputFile.write(line.decode('utf-8'))
@@ -79,6 +83,6 @@ if __name__ == '__main__':
 
     for tool in myMeas.getTools():
         logging.info('Defined tools in ini file are: {}'.format(tool))
-
-    myMeas.startMeasurement('dumpwide', 1420, 120, measFile)
+        myMeas.startMeasurement(tool, 1420, 120, measFile)
+   
     measFile.close()