strange behavior of 3dface

[motee-z]

Hello friends i have in attached drawing 2 3dfaces i want to apply command loft on first one and second one but when selecting first 3d face it rejected and said invalid object i was filtered out but when moving or copying this object to some other places it worked so i want an explanation of what is happening

loft on 3dface.dwg

[motee-z]

where are experts of autocad no answer since five days 

[SLW210]

AutoCAD gets strange sometimes when objects get far away from 0,0,0.

 

That's all I can come up with.

[yangguoshe]

First, use the region command to convert two 3D faces into regions, then you can use the loft command to create a loft surface, and then use the surfsculpt command to create a 3D solid