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			Hi, 
		
		
		
		
		
		
		
		
	
	So version 2.51 worked fine on the same machine with a Gforce 2, but version 2.53f does not? Upgrading to a newer card might help, but either way we will try to fix the problem. Does this happen with all scripts? Can you try running a basic script that just calls viz.go() and see if the problem still occurs?  | 
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