帮我看看一个命令，为什么不能计算

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1. fini
   
2. /clear
   
3. /prep7
   
4. et,1,beam188
   
5. mp,ex,1,206000
   
6. mp,prxy,1,0.3
   
7. sectype,1,beam,L
   
8. secdata,50,50,4,4
   
9. 
   
10. et,2,mpc184
    
11. r,1,1,1,1,1,1
    
12. 
    
13. k,1,
    
14. k,2,150
    
15. k,3,450
    
16. k,4,750
    
17. k,5,1050
    
18. k,6,1350
    
19. k,7,1650
    
20. k,8,1800
    
21. 
    
22. l,1,2
    
23. l,2,3
    
24. l,3,4
    
25. l,4,5
    
26. l,5,6
    
27. l,6,7
    
28. l,7,8
    
29. 
    
30. lesize,all,50
    
31. latt,1,,1
    
32. secnum,1
    
33. lmesh,all
    
34. 
    
35. DK,1,UX
    
36. DK,1,UY
    
37. DK,1,UZ
    
38. DK,1,ROTX
    
39. 
    
40. 
    
41. DK,8,UY
    
42. DK,8,UZ
    
43. DK,8,ROTX
    
44. 
    
45. n,50,150,-81.3,
    
46. n,51,450,-81.3,
    
47. n,52,750,-81.3,
    
48. n,53,1050,-81.3,
    
49. n,54,1350,-81.3,
    
50. n,55,1650,-81.3,
    
51. 
    
52. n,56,150,-81.3,-17
    
53. n,57,450,-81.3,-17
    
54. n,58,750,-81.3,-17
    
55. n,59,1050,-81.3,-17
    
56. n,60,1350,-81.3,-17
    
57. n,61,1650,-81.3,-17
    
58. 
    
59. type,2
    
60. real,1
    
61. e,2,50
    
62. e,5,51
    
63. e,11,52
    
64. e,17,53
    
65. e,23,54
    
66. e,29,55
    
67. e,56,50
    
68. e,57,51
    
69. e,58,52
    
70. e,59,53
    
71. e,60,54
    
72. e,61,55
    
73. allsel
    
74. 
    
75. nsel,s,node,,56,61,1
    
76. f,all,fy,-337
    
77. f,all,fz,306
    
78. allsel
    
79. 
    
80. /solu
    
81. solve
    
82. /post1
    
83. plnsol,s,int
    
84. esel,s,type,,1

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htbbzzg

看你的命令流，应该可以计算的，但是可能不能显示应力结果
不知出现什么问题？你可以看一下节点位移的结果是否存在。