Hello! Working with Houdini Indie for a few days now and I am noticing numerous issues with the FBX Output SOP when outputting meshes.

Here are my questions / issues...

1) Why do I get errors with the ROP FBX Output SOP that I do not get with ROP Geometry Output SOP? In my network, I have a height field with erode node. When I try to save the FBX to disk, there is an error on the FBX Output:
"Invalid source ../heightfield_erode/smooth_water/compile_end15, First writable volume has no corresponding volume".

The error is not present when using ROP Geometry Output SOP.

2) How do I output an FBX sequence using the ROP FBX Output SOP? When I set the frame range to 'Render Frame Range' and add '$F' as a suffix to the file name, only the first frame renders.

3) This post [www.sidefx.com] mentions a workaround to outputting FBX sequences using a script, however in my use case, I am noticing that the output is painfully slow. I imagine it's calculating the entire network on every output and trashing the cache, but I'm not entirely sure. Is there a way to get the FBX Output to keep the existing cache and only update the necessary nodes?

4) The ROP Geometry Output SOP seems to do everything I need for outputting OBJ sequences. If I use this node to output FBX files, I can't open the files in Unity or the Windows 3D viewer. They seem to be corrupted / not properly formatted. Is there a way to set proper FBX formatting using the ROP Geometry Output?

Thanks!