Arguments

ename  entity name to be erased or unerased

Return

ename  is returned if successful, NIL otherwise

Example

Remarks

only main entities can be erased or unerased, not sub-entities like vertices, attributes, or entities inside a block definition;
also works on objects (i.e. XRecords)

there are several , to verify whether an entity is actually erased or not :
a) (entget  ename)  returns NIL for an erased entity (slow)
b) (vlax-erased-p  ename)  returns T for an erased entity (fast, supports ENAME + VLA-OBJECT)
c) (vlax-ename->vla-object  ename)  returns NIL for an erased entity
d) (vle-ename-valid  ename)  returns NIL for an erased entity    (BricsCAD specific)