XSI 6 breaking Ultimapper in XSI 5.11

[André Adam <a_adam(at)49games.de>]

Hi everybody, happy new year!

We've hit a strange bug today, where having XSI 6 and XSI 5.11 installed 
in parallel breaks the Ultimapper tool in XSI 5.11; it just does not 
render anything anymore. This applies to all of our workstations 
(Windows) and both XSI flavours (32bit, 64bit). Deinstalling both, XSI 6 
and XSI 5.11 and reinstalling XSI 5.11 seems to fix this particular problem.
Perhaps someone running a similar setup can spend two minutes to run the 
script below (supposed to render a normal map of a cube to c:\) before I 
fire this off to support to make sure there is nothing weird with our 
install and this is a common issue. The script should run without error, 
but there should be no rendering process in the end and the file written 
to disk should be 0 bytes. That's what we experience over here.

Thanks!

   -André

NewScene();
CreatePrim("Cube", "MeshSurface", "CubeLow");
CreatePrim("Cube", "MeshSurface", "CubeHigh");
SetValue("CubeHigh.polymsh.geom.subdivu", 4, null);
SetValue("CubeHigh.polymsh.geom.subdivv", 4, null);
SetValue("CubeHigh.polymsh.geom.subdivbase", 4, null);
MakeLocal("CubeHigh.geomapprox");
SetValue("CubeHigh.geomapprox.gapproxmosl,CubeHigh.geomapprox.gapproxmordrsl", 
Array(3, 3));
GenerateUniqueUVs("CubeLow", "Texture_Projection");
AddProp("Ultimapper", "CubeLow");
SetValue("CubeLow.Ultimapper.Texcoord", "Texture_Projection");
CreateVertexColorSupport("ColorAtVertices", "Tangents", "CubeLow");
SetValue("CubeLow.Ultimapper.Tangent", "Tangents");
ApplyOp("TangentOp2_cpp", 
"CubeLow.polymsh.cls.Texture_Coordinates_AUTO.Tangents;CubeLow.polymsh.cls.Texture_Coordinates_AUTO.Texture_Projection", 
siUnspecified, siPersistentOperation, null, 2);
SetValue("CubeLow.Ultimapper.Group", "CubeHigh");
SetValue("CubeLow.Ultimapper.Resolution", 2048);
SetValue("CubeLow.Ultimapper.SuperSampling", 3);
SetValue("CubeLow.Ultimapper.MapPath", "c:\\");
GenerateUltimapper("CubeLow.Ultimapper");

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