enhancement so that trace in mulitple runs is outputted correctly

dream/simulation/ExcelHandler.py

@@ -57,4 +57,12 @@ def outputLog(fileName='Log', entityList=G.EntityList):
                     sheetIndex+=1
                     logSheet=logFile.add_sheet('sheet '+str(sheetIndex), cell_overwrite_ok=True)
                     
-    logFile.save(str(fileName)+'.xls')  
\ No newline at end of file
+    logFile.save(str(fileName)+'.xls')  
+    
+def resetTrace():
+    # data for the trace output in excel
+    # -----------------------------------------------------------------------
+    G.traceIndex=0                    #index that shows in what row we are
+    G.sheetIndex=1                    #index that shows in what sheet we are
+    G.traceFile = xlwt.Workbook()     #create excel file
+    G.traceSheet = G.traceFile.add_sheet('sheet '+str(G.sheetIndex), cell_overwrite_ok=True)  #create excel sheet  
\ No newline at end of file

dream/simulation/LineGenerationJSON.py

@@ -1315,6 +1315,7 @@ def main(argv=[], input_data=None):
         #output trace to excel      
         if(G.trace=="Yes"):
             ExcelHandler.outputTrace('trace'+str(i))  
+            ExcelHandler.resetTrace()
     
     G.outputJSONFile=open('outputJSON.json', mode='w')
     G.outputJSON['_class'] = 'Dream.Simulation';