Need a little help with Python script error

[MK]

With whatever bits of documentation I could find, I was able to
write my first simple script to play a money game against the bot.

It tries to duplicate a experiment done a couple of years ago in
RGB by Axel, doubling at >50% and taking at >0%.

It seems to be working except for "What? No dice?" errors at
different times but invariably in every game, mostly towards the
end but sometimes even after the game finishes.

All auto roll/play settings are off. I wonder if the script gets
ahead of or lags behind the bot or such..? Below are the errors
followed by the script itself. Thanks for any help.

MK

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Exception                                 Traceback (most recent call last)
<ipython-input-7-ff647b75da95> in <cell line: 2>()
     51         continue
     52     gnubg.command('roll') # had access to cube with no action, now make 
move
---> 53     bestmove = gnubg.findbestmove()
     54     board = gnubg.board()
     55     move = gnubg.movetupletostring(bestmove, board)

Exception: What? No dice?

Exception                                 Traceback (most recent call last)
<ipython-input-5-ff647b75da95> in <cell line: 2>()
     20     if cubeowner == 0 and doubled ==0: # don't have access to cube, 
just move
     21       gnubg.command('roll')
---> 22       bestmove = gnubg.findbestmove()
     23       board = gnubg.board()
     24       move = gnubg.movetupletostring(bestmove, board)

Exception: What? No dice?

==============================================================
session = 1
while session < 2: # set to number games wanted
  session = session + 1
  gnubg.command('new game')
  movecount = 0 # will be used later to determine game stages
  gamestate = 1
  while gamestate == 1:
    posinfo = gnubg.posinfo()
    turn = posinfo['turn']
    resigned = posinfo['resigned']
    doubled = posinfo['doubled']
    gamestate = posinfo['gamestate'] # 0=no game 1=playing 2=over 3=resigned 
4=dropped
    movecount = movecount + 1
    if resigned == 1:
      gnubg.command('agree')
      break
    cubeinfo = gnubg.cubeinfo()
    cubeowner = cubeinfo['cubeowner'] # bot=0 human=1 center=-1
    beaver = cubeinfo['beavers']
    if cubeowner == 0 and doubled ==0: # don't have access to cube, just move
      gnubg.command('roll')
      bestmove = gnubg.findbestmove()
      board = gnubg.board()
      move = gnubg.movetupletostring(bestmove, board)
      gnubg.command(move)
      continue
    cubeless = gnubg.evaluate()
    win = cubeless[0] # cubeless win%
    if turn == 1 and doubled == 1: # respond to bot's double
      if win > 0.50 and beaver < 2:
        gnubg.command('beaver')
        continue
      elif win > 0:
        gnubg.command('take')
        continue
      else:
        gnubg.command('drop')
        break
    if turn == 1 and beaver == 1: # respond to bot's beaver
      if win > 0:
        gnubg.command('take')
        continue
      else:
        gnubg.command('drop')
        break
    if cubeowner == 1 or cubeowner == -1: # double
      if win > 0.50 and movecount > 1:
        gnubg.command('double')
        continue
    gnubg.command('roll') # had access to cube with no action, now make move
    bestmove = gnubg.findbestmove()
    board = gnubg.board()
    move = gnubg.movetupletostring(bestmove, board)
    gnubg.command(move)
  filename = 'D:\mk' + str(session) # will use better file names later
  gnubg.command("'save game' filename")
gnubg.command('exit')
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