Python script error

Revit
,
1

I get the following error when running the code below:

Warning: IronPythonEvaluator.EvaluateIronPythonScript operation failed.
Traceback (most recent call last):
File “”, line 47, in
IndexError: index out of range: 4

import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

clr.AddReference("RevitNodes")
import Revit

from Revit.Elements import *

import clr
clr.AddReference("DSCoreNodes")
from DSCore import *

#The inputs to this node will be stored as a list in the IN variables.


#Assign your output to the OUT variable.
OUT = []

numberOfRevitentries = IN[0]
numberOfExcelentries = IN[3]
RevitLst = IN[1]
ExcelLst = IN[2]

Excelcount = 0
Revitcount = 0



RevitArray = List.GetItemAtIndex(RevitLst,Revitcount)
RevitRevDescription = List.FirstItem(RevitArray)
RevitRevDate = List.GetItemAtIndex(RevitArray,1)
RevitIssuedStatus = List.GetItemAtIndex(RevitArray,2)
RevitRevSequence = List.GetItemAtIndex(RevitArray,3)


ExcelArray = List.GetItemAtIndex(ExcelLst,Excelcount)
ExcelRevDescription = List.FirstItem(ExcelArray)
ExcelRevDate = List.GetItemAtIndex(ExcelArray,1)
ExcelIssuedStatus = List.GetItemAtIndex(ExcelArray,2)
ExcelRevSequence = List.GetItemAtIndex(ExcelArray,3)


while(Revitcount < numberOfRevitentries and Excelcount < numberOfExcelentries):
	if(RevitRevDescription == ExcelRevDescription and RevitRevSequence ==ExcelRevSequence):
		Excelcount = Excelcount + 1
		ExcelArray = List.GetItemAtIndex(ExcelLst,Excelcount)		
	else:
		RevitArray = List.GetItemAtIndex(RevitLst,Revitcount)
		Revitcount = Revitcount + 1 



	
			
#count = count + 1

OUT = Revitcount

Capture
Capture.PNG587×608 31.3 KB

2

Index out of range means the index you’re using in List.GetItemAtIndex is greater than size of list. You’re adding 1 to Excelcount before fetching item List.GetItemAtIndex(ExcelLst, Excelcount). Inverting the two lines should fix it.