Issues with binary and ascii format

Hello Team,

Good morning. I'm trying to learn LIGGGHTS to simulate the filling of the spherical particles into a cuboid container defined by 6 planes oriented along X-Y-Z axes. In order to define the walls, we can choose *.stl files either in ascii or binary formats. When I used the binary format, I observed that the planes are imported only the half length in each of the direction. At first, I thought it could be the visualization issues in the paraView but when I simulate the particle collisions near to wall, say normal to x axis, the particles bounce back into domain on the "read half plane" but escape out of the geometry from the gap that is formed by "un-reading" the complete wall. I tried by changing domain extents so that all x, y z coordinates are fully positive / fully negative but all in vain. I've attached an image(s) for your reference.

1. Is there an issue with reading binary formats of *.stl file?

Thank you,
Jagan1Mohan