Houdini 16, I encountered a funny problem with UV Flatten node.
I created a polymesh sphere and dropped down UV Flatten node, tried to select the primitive group, by clicking arrow on the right side of group field:
- if I select part of the prims of the sphere, it works. I can see number of prims in the group field; but
- if I select all the prims, then nothing appears in the group field; and
- If I insist, “BOOM” “Fatal Error!”

I am working on
Houdini FX (apprentice version)
build 16.0.633
Lenovo Thinkstation P500
Intel Xeon E5-1630V3 @3.7GHz
nVidia Quadro M4000
32Gb RAM

Shiva99
if I select all the prims, then nothing appears in the group field; and

That is normal. An empty group field means all the primitives, so when you select all it will be replaced with an empty string.

Shiva99
- If I insist, “BOOM” “Fatal Error!”

That isn't normal. You should get a warning about their being no boundary for it to flatten. What do you mean by “insist”? Can you save a .hip file prior to the crash so we can make sure we're trying to reproduce the same thing?

Thanks for the feedback.
I meant, if i keep trying to select all prims and type enter several times then it crashes.
It happens 2 times out of many.