Hardware instancing problem with Panda 1.8

General Discussion
3

but k must be a power of 2?
I set k to 100 and gives me this error:

:display:gsg:glgsg(error): offsets: incorrect number of elements, expected 1024 got 400

I changed the code like this (this is a code snippet):

      self.cube=self.loader.loadModel(pandafile)
      self.cube.flattenLight() 
      self.cube.reparentTo(render) 

      k = ABSPOS**2 
      offsets = PTA_LVecBase4f.emptyArray(k); 
      count = 0 
      for x in range(ABSPOS):
         xp=x*10 
         for y in range(ABSPOS): 
            offsets[count] = UnalignedLVecBase4f(xp,y*10, 0, 0) 
            count += 1 
      self.cube.setShaderInput('offsets', offsets) 
      self.cube.setShader(Shader.load('instance.cg')) 
      self.cube.setInstanceCount(k)

thanks for all