我在用STAAD.PRO 2006软件分析建好的模型时经常分析失败，并显示***STAAD-2D ERROR***
***STAAD-2D ERROR***
SPACE FRAME, SOLID AND PLATE ELEMENT, DYNAMIC ANALYSIS ARE NOT AVAILABLE IN STAAD-2D
请使用STAAD软件的网友帮忙分析一下，问题到底出在哪。
我建立的模型代码如下：
STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 12-Jul-11
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES

1 0 0 0

2 3 0 0

3 0 3 0

4 3 3 0

5 0 0 3

6 3 0 3

7 0 3 3

8 3 3 3
MEMBER INCIDENCES

1
3
4

2
1
3

3
2
4

4
7
8

5
5
7

6
6
8

7
3
7

8
4
8
DEFINE MATERIAL START
ISOTROPIC STEEL
E 2.05e+008
POISSON 0.3
DENSITY 76.8195
ALPHA 1.2e-005
DAMP 0.03
END DEFINE MATERIAL
MEMBER PROPERTY CHINESE
2 3 5 6 TABLE ST HW250X250
1 4 7 8 TABLE ST I25A
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
1 2 5 6 FIXED
LOAD 1 LOADTYPE None
TITLE LOAD CASE 1
SELFWEIGHT Y -1
FLOOR LOAD
YRANGE 2.875 3.125 FLOAD -10 GY
PERFORM ANALYSIS
FINISH