리습이에러나는것 같습니다

명령어를 하면 v자 홈이 생겨야 하는데 원만생기고 끝입니다 
메세지는 이렇게 되네요
Command: TTT
V자 홈파기(Enter)?……..찢기(G) :

<1.5>표시지름?: 1.5

절곡선 선택Unknown command “TTT”.  Press F1 for help.

Invalid response.

Cannot invoke (command) from *error* without prior call to (*push-error-using-command*).
Converting (command) calls to (command-s) is recommended.
Specify first fence point or pick/drag cursor:


왜이런걸까요??  ㅠㅠ