How to use yield effectively? Why the game crashed when I added it?

Hi, there,
I got some problems on 'yield' function:
The whole game crashed when I added a yield function in the Start().

The code is
www = WWW("file://D:\1.jpg")
yield www

There surely is a 1.jpg under D:\, but when I added the 'yield www', the game crashed.
Why? Does anyone know about this?

Thanks a lot!

 

Your syntax on the url is wrong, it should be :
www = WWW("file://D:/1.jpg")

 

Oh, I think I pasted the code to here wrongly!
It is 'www = WWW("file://D:/1.jpg")' in my script, and when I added the 'yield', the game crashed.
Do you know why? I am kind of rookies in 'yield' function.

Thanks!

 

it should work just fine, can you post the complete code ?

 

Ok, but the whole game is about 2800 lines, so I just paste the part of 'www' and 'yield' here:
#the function of the code here is to read a path of an image from a file, then load the image based on the path. So I use the www to do the job. BTW, the script is in Boo.

www as WWW

Path_For_File = Application.dataPath + '/' + "Customer_Face_1.txt"
temp_txt = ""
try:
using text_file = StreamReader(Path_For_File):
temp_txt = text_file.ReadLine()
temp_x = text_file.ReadLine()
temp_y = text_file.ReadLine()
except e as FileNotFoundException:
pass

if temp_txt == "Default" or temp_txt == "":
Face_0.mainTexture = Default_Face_0
Face_0_Offset.x = -0.12
Face_0_Offset.y = -0.03
else:
WaitingForImage(temp_txt)
#when I add yield www here, game crashed!
#yield www
Face_0.mainTexture = www.texture
Face_0_Offset.x = single.Parse(temp_x)
Face_0_Offset.y = single.Parse(temp_y)

#here is the defination of WaitingForImage()
def WaitingForImage(file as string):
www = WWW("file://" + file)