pyHelpers error after 1.61

[naf4ever]

This pops up if im in debugmode and start a new game:

It doesnt seem to actually affect gameplay but im thinking it cant be good. The problem seems to stem from when i call up a pyhelpers function in my mod.

The line 46 in my mod it refers to looks like this:

def onImprovementBuilt(self, argsList):
		'Improvement Built'
		iImprovement, iX, iY = argsList
		quarry = gc.getInfoTypeForString("IMPROVEMENT_QUARRY")
		pMap = CyMap()
		pPlot = pMap.plot(iX, iY)
		pPlayer = pPlot.getOwner()
		player = gc.getPlayer(pPlayer)

line 46         unitList = PyPlayer(pPlayer).getUnitList()

The code for the PyHelpers that is causing problems looks like this:

def getUnitList(self):
		' UnitList - All of the players alive units '
		lUnit = []
line 256        (loopUnit, iter) = self.player.firstUnit(false)
		while( loopUnit ):
			if ( not loopUnit.isDead() ): #is the unit alive and valid?
				lUnit.append(loopUnit) #add unit instance to list
			(loopUnit, iter) = self.player.nextUnit(iter, false)
		return lUnit

I of course havent touched pyhelpers.py at all and this code is straight from the default files in civ4 with version 1.61.

Should i be worried about this problem?