Import file from rhino to 3DEC

hello, when i import this model to 3DEC this error message appears “Error in csetfadj, face not found in block 1. While processing line 3 of source C:/Users/hudanihad/Documents/Itasca/3dec700/My Projects/baba.dat.”
what’s that mean and how can I solve it.

if it is a real model, you must use griddle to export that mesh as a .3dgrid file and then import it into 3DEC

Theoretically, you can build 3DEC blocks directly from a VRML file - as long as the blocks in the VRML file form convex shapes. See this example. However, it seems that your mesh has some problems - I opened it in Rhino and ran a check and got the following. So maybe you just need to fix it up?

It’s also possible to generate a mesh from an STL or dxf using this command, but again, it seems that there are some problems with the geometry that is preventing this from working.