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Unable to do volume advection using pyro


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I am trying to do pyro advection of a volume. I am following this tutorial. 

The chapter 4a begins at 28min:58 sec. 

At 47min:37 sec, Steven changes bindings for turbulence from 'temperature' to 'density' and he is able to achieve advection of the volume immediately after that. However, when I do the same and I press the play button, my volume just disappears over time. It seems as if the binding for 'density' is not getting activated at my end for some unknown reason. Moreover, unlike Steven, my pyro solver is not creating attributes of vel and pressure. I tried the same steps in a new pyro solver but still I am failing. 
Screenshot from Steven's tutorial.


What I experience. 

 What should I do?

volume advection issue_knipping.hip

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