AutoCAD SUBTRACT and UNION Error

Good day mga bossing!
me ginagawa po akong 3D model ng aluminum joint namen, kaso may mga pagkakataon na kapag mag uUNION or SUBTRACT Command ako, may error at di magdiretso ung command.
ganito po ung error na lumalabas:

"System inconsistency processing edge coincidence"

minsan naman po ganito:

"Coincident face_face_ints with different body vertices"

ano pong remedy ang pwede gawin ditto?

salamat po

isa pa pong error na lumalabas kapag ginagamit ko ang SUBTRACT Command:

"Inconsistent information in vertex and coedge attributes"

salamat po

Good morning Sir,
Sir, try mo kaya na bago mo Subtract or union ang isang object either adjust mo yung Facetres at Isolines ng object. Minsan nasa memory din yan eh at di kaya ng PC. If not bago ka mag execute both as refering sa gusto mo. explode mo yung object mo at para makita mo yung mga faces n'ya at mga vertices if are coincide each edges at vertices. Tapos delete mo yung mga faces or vertex na di coplanar at gawa ka ng panibagong 3dfaces ng object mo. Then after that use the Command: SURFSCULFT then enter and select all 3dfaces object para ma convert ulit sa 3DObject, then try again your desirable as reference to your subject. Try to explore lang Sir maybe it might solve your problem or it it will help you to have some other ideas and Command which are very usefull.

Regards,
Dongding