Error with get_quote

Hi
Not sure what I am doing wrong
My script is further below.
On execution kite.quote is giving me below error. However if I comment out kite.quote; the print kite.positions() goes through fine and lists all my positions. Earlier in the day though the same kite.quote gave me proper results. Is there some issue with "quote" api now?

Traceback (most recent call last):
  File "openko_functions.py", line 28, in <module>
    print kite.quote("NSE","RELIANCE")
  File "C:\Program Files (x86)\Python27\lib\site-packages\kiteconnect\__init__.py", line 501, in quote
    return self._get("market.quote", {"exchange": exchange, "tradingsymbol": tradingsymbol})
  File "C:\Program Files (x86)\Python27\lib\site-packages\kiteconnect\__init__.py", line 577, in _get
    return self._request(route, "GET", params)
  File "C:\Program Files (x86)\Python27\lib\site-packages\kiteconnect\__init__.py", line 668, in _request
    raise(exp(data["message"], code=r.status_code))
kiteconnect.exceptions.TokenException: Invalid token

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#!python
from kiteconnect import KiteConnect
import raz_tokens

# Initialise.
my_api_key = raz_tokens.api_key
my_access_token = raz_tokens.access_token

kite = KiteConnect(api_key = my_api_key, access_token = my_access_token)
kite.set_access_token(my_access_token)

rel_quote = kite.quote("NSE","RELIANCE")
print rel_quote
print kite.positions()

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