CHUTE CONVEYOR - help

Hello

I'm trying to perform the simulation of a chute, and I've been experiencing difficulties ... some I can solve by analyzing the forum, others I can not. My in.conveyor that I am using:

https://paste.ubuntu.com/25019462/

My problem is in section "PARTICLE INSERTION"; When I try to run with 'insert/stream' the Liggghts show me the erro:

WARNING: Fix mesh: Mesh contains highly skewed element, moving mesh (if used) will not parallelize well (../surface_mesh_I.h:656)
WARNING: Fix mesh: Mesh contains highly skewed element, moving mesh (if used) will not parallelize well (../surface_mesh_I.h:656)
WARNING: Fix insert/stream: Extruded insertion face extends outside domain, may not insert all particles correctly (../fix_insert_stream.cpp:524)
ERROR: Fix insert/stream (id ins1): insertion volume could not be distributed properly in parallel. Bad decomposition or insertion face extrusion is too small or outside domain (../fix_insert_stream.cpp:515)

When I reduce the extrude_length (to 0.5), it shows me:

ERROR: Fix insert/stream (id ins1): 'extrude_length' is too small (../fix_insert_stream.cpp:320)
(../fix_insert_stream.cpp:320)

In my attempt to evade this problem, I used the command 'insert/rate/region'. However, although I managed to make the simulation progress ... it did not insert the particles correctly and I did not understand the real reason (attached image - the particles are in the center of the image, apparently a line looks like.).

About the neighbor:

I used the formula: ((length in X)/2)/(2*(maximum particle radius)). Another number of neighbor, the LIggghts show me:

ERROR on proc 0: Too many neighbor bins (../neighbor.cpp:1778)
x��eW (../neighbor.cpp:1778)

...or, the RAM explode.

In some forums (LAMMPS) I read about changing the boundary to 'f f f', but also to no avail (and I would very much like to understand his relation to the 'neighbor').

There are many questions and I would like to be able to answer them to continue my research.

Thank you for your attention.