Hi, i am trying to read particles, from a bgeo sequence, into material, and i get the following error when trying rendering:

mantra: VEX error - pcopen() requires a constant argument for the ‘preload’ keyword argument

Trying to create smoke sime where the color comes from the particles.

Im using the following path for the point cloud texture: $HIP/cache/particles_$F4.bgeo

Any ideas? Using Houdini 14.0.275