varying user-data count wrong

[horst.pansen]

So I spawn particles on a surface, create particle trails and convert them into strands. The material color is driven by aiuserdatacolor which gets its color from vertex paint. Arnold doesn't render the strands in the "vertex color" but only in standart aisurface color.

It gives me this error: // Warning: WARNING | input0_0_0_graph_outputs_0_strands: varying user-data count wrong! (found 10500 expected 11700) -- disabling user-data 'color'

As soon as I disable "Lable point ID" Arnold renders the correct color, but it doesn't give me the wanted simulation results.

In addition, the particles render the correct color, as soon as I disable strands (with Lable point ID enabled)

Last but not least, it used to render correctly some months ago, when I first made this graph.

Edit: As soon as I pause the sim and disconnect the surface on which the particles spawn, and then resume the sim  just for a frame (or longer), the strands render with the correct color. XD

Any help would be appreciated.

[sepu6]

Arnold as far as I know, does not render if the strands have less than 4 pts. In Vray when I render strands this is not an issue, so is an Arnold issue, maybe this has been fixed on the latest, but I have not checked. 

Also post your scene, is easier to help

[horst.pansen]

sorry for the belated reply. attached the scene file.

thanks for your help!

[sepu6 · Accepted solution]

add a resample and that should do it. 

 

 

[horst.pansen]

That worked like a charm,

thank you very much for your help! Didn't even know this node existed.