自定义实体的问题

超然A

CAD中一个自定义实体,用ENTGET命令得到的列表如下:

((-1 . <Entity name: 7ec032c8>) (0 . "SBCS_CABLE") (330 . <Entity name:
7ec01c10>) (5 . "409") (100 . "AcDbEntity") (67 . 0) (410 . "Model") (8 .
"Buried") (6 . "Continuous") (100 . "SbcsOptiEntity") (70 . 7) (40 . 1.0) (40 .
1.0) (40 . 1.0) (70 . 0) (70 . 2) (40 . 8.04818e+006) (40 . 0.0) (280 . 80)
(300 . "BUCA") (300 . "ALMW-100") (90 . 1980) (300 . "HS4268") (300 . "") (300
. "") (300 . "JA003") (300 . "45C") (300 . "1") (90 . 0) (90 . 15) (90 . 1) (10
0.0 0.0 0.0) (40 . 0.0) (90 . 100) (90 . 0) (70 . 3) (90 . 2) (10 724.302
227.492 0.0) (90 . 0) (40 . 0.0) (40 . 15.708) (40 . 1.0) (90 . 0) (90 . 0) (10
826.2 528.47 0.0) (90 . 0) (40 . 0.0) (40 . 23.565) (40 . 1.0) (90 . 0) (90 .
1) (10 669.222 206.601 0.0) (90 . 0) (40 . 0.497512) (40 . 6.0614) (40 . 1.0)
(90 . 1) (70 . 2) (90 . 2) (300 . "108WS") (90 . 1) (90 . 75) (300 . "") (90 .
0) (90 . 0) (300 . "") (90 . 0) (90 . 0) (300 . "") (90 . 0) (90 . 0) (300 .
"") (90 . 0) (90 . 0) (300 . "") (90 . 0) (90 . 0) (70 . 0) (70 . 0) (40 . 0.0)
(300 . "") (300 . "A") (90 . 76) (90 . 100) (300 . "") (90 . 0) (90 . 0) (300 .
"") (90 . 0) (90 . 0) (300 . "") (90 . 0) (90 . 0) (300 . "") (90 . 0) (90 . 0)
(300 . "") (90 . 0) (90 . 0) (70 . 0) (70 . 0) (40 . 0.0) (300 . "") (70 . 2)
(90 . 0) (100 . "SbcsBrokenLine") (70 . 2) (70 . 5) (10 605.402 220.992 0.0)
(40 . 0.0) (40 . 0.0) (40 . 0.0) (10 645.1 211.74 0.0) (40 . 0.0) (40 . 0.0)
(40 . 0.0) (10 669.222 206.601 0.0) (40 . 0.0) (40 . -1.0e-005) (40 . -22.6684)
(10 687.036 202.584 0.0) (40 . 0.0) (40 . 0.0) (40 . 0.0) (10 733.686 221.021
0.0) (40 . 0.0) (40 . 0.0) (40 . 0.0) (70 . 1) (70 . 0) (100 .
"SbcsLineSymbol") (70 . 1) (300 . "B") (300 . "ALMW-100") (90 . 1) (100 .
"SbcsCable") (70 . 5) (300 . "45C") (300 . "") (300 . "") (300 . "") (300 .
"JA003") (300 . "") (300 . "") (300 . "") (90 . 1556) (90 . 1688) (90 . -1) (90
. -1) (90 . -1) (40 . 0.0) (40 . 0.0) (90 . 0) (90 . 0) (90 . 0) (90 . 1) (90 .
1) (90 . 0) (90 . 0) (40 . 0.0) (40 . 100.0) (90 . 1) (90 . 0) (90 . 0))

现在的问题是,我通过lisp的entmod,entupd函数增加结点,但是在线上只能增加一个结点.在增加第二个结点的时候就会出下面的提示:

Newer Version Cable disabled.  You must upgrade to edit this symbol.

不知该如何解决.                  自定义实体的截图在附件中.