Please see the attached model and tell me why these member showing instability. how to remove these instability.

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 07-Jun-17
END JOB INFORMATION
INPUT WIDTH 79
UNIT INCHES POUND
JOINT COORDINATES
1 0 0 0; 2 0 0 120; 3 46 0 0; 4 46 0 120; 5 151 0 0; 6 151 0 120; 7 256 0 0;
8 256 0 120; 9 348 0 0; 10 348 0 120; 11 429 0 0; 12 429 0 120; 13 493 0 0;
14 493 0 120; 15 547 0 0; 16 547 0 120; 17 576 0 0; 18 576 0 120; 19 671 0 0;
20 671 0 120; 21 776 0 0; 22 776 0 120; 23 881 0 0; 24 881 0 120; 25 0 0 36;
26 46 0 36; 27 151 0 36; 28 256 0 36; 29 348 0 36; 30 429 0 36; 31 493 0 36;
32 0 0 84; 33 46 0 84; 34 151 0 84; 35 256 0 84; 36 348 0 84; 37 429 0 84;
38 493 0 84; 39 547 0 36; 40 547 0 84; 42 429 0 27; 43 493 0 27; 44 429 0 93;
45 493 0 93; 50 20 -14 0; 51 20 -14 120; 54 152 -14 0; 55 152 -14 120;
58 257 -14 0; 59 257 -14 120; 62 349 -14 0; 63 349 -14 120; 66 577 -14 0;
67 577 -14 120; 70 672 -14 0; 71 672 -14 120; 74 777 -14 0; 75 777 -14 120;
78 882 -14 0; 79 882 -14 120; 82 348 50 0; 83 429 50 0; 84 429 50 120;
85 493 50 0; 86 493 50 120; 87 576 50 0; 88 576 50 120; 89 46 50 36;
90 151 50 36; 91 256 50 36; 92 348 50 36; 93 46 50 84; 94 151 50 84;
95 256 50 84; 96 348 50 84; 97 0 50 0; 98 46 50 0; 99 46 50 120;
103 348 50 120; 104 0 50 120; 105 0 50 36; 106 0 50 84; 107 348 25 0;
108 429 25 0; 109 429 25 120; 110 493 25 0; 111 493 25 120; 112 576 25 0;
113 576 25 120; 114 46 25 36; 115 151 25 36; 116 256 25 36; 117 348 25 36;
118 46 25 84; 119 151 25 84; 120 256 25 84; 121 348 25 84; 122 0 25 0;
123 46 25 0; 124 46 25 120; 125 348 25 120; 126 0 25 120; 127 0 25 36;
128 0 25 84; 129 46 -46 0; 130 46 -46 120;
MEMBER INCIDENCES
1 1 25; 2 1 3; 3 2 4; 4 3 26; 5 3 5; 6 4 6; 7 5 27; 8 5 7; 9 6 8; 10 7 28;
11 7 9; 12 8 10; 13 9 29; 14 9 11; 15 10 12; 16 11 42; 17 11 13; 18 12 14;
19 13 43; 20 13 15; 21 14 16; 22 15 39; 23 15 17; 24 16 18; 25 17 18; 26 17 19;
27 18 20; 28 19 20; 29 19 21; 30 20 22; 31 21 22; 32 21 23; 33 22 24; 34 23 24;
35 3 6; 36 5 8; 37 7 10; 38 9 12; 39 25 32; 40 26 33; 41 27 34; 42 28 35;
43 29 36; 44 30 37; 45 31 38; 46 25 26; 47 26 27; 48 27 28; 49 28 29; 50 29 30;
52 32 2; 53 33 4; 54 34 6; 55 35 8; 56 36 10; 57 37 44; 58 38 45; 59 33 32;
60 33 34; 61 34 35; 62 35 36; 63 36 37; 64 39 40; 65 40 16; 66 31 39; 67 38 40;
69 42 30; 70 43 31; 71 42 43; 72 44 12; 73 45 14; 74 44 45; 75 17 20; 76 19 22;
77 21 24; 81 50 51; 84 54 55; 87 58 59; 90 62 63; 93 66 67; 96 70 71; 99 74 75;
102 78 79; 105 9 107; 106 11 108; 107 12 109; 108 13 110; 109 14 111;
110 17 112; 111 18 113; 112 26 114; 113 27 115; 114 28 116; 115 29 117;
116 33 118; 117 34 119; 118 35 120; 119 36 121; 120 1 122; 121 3 123;
122 4 124; 126 97 98; 127 98 89; 128 89 90; 129 90 91; 130 91 92; 131 92 82;
132 82 83; 133 85 83; 134 85 87; 135 87 88; 136 88 86; 137 86 84; 138 10 125;
139 84 103; 140 103 96; 141 96 95; 142 95 94; 143 94 93; 144 93 99; 145 2 126;
146 25 127; 147 32 128; 148 97 105; 149 105 106; 150 106 104; 151 104 99;
152 107 82; 153 108 83; 154 109 84; 155 110 85; 156 111 86; 157 112 87;
158 113 88; 159 114 89; 160 115 90; 161 116 91; 162 117 92; 163 118 93;
164 119 94; 165 120 95; 166 121 96; 167 122 97; 168 123 98; 169 124 99;
170 125 103; 171 126 104; 172 127 105; 173 128 106; 174 122 123; 175 123 114;
176 114 115; 177 115 116; 178 116 117; 179 117 107; 180 107 108; 181 110 108;
182 110 112; 183 112 113; 184 113 111; 185 111 109; 186 109 125; 187 125 121;
188 121 120; 189 120 119; 190 119 118; 191 118 124; 192 122 127; 193 127 128;
194 128 126; 195 126 124; 209 1 129; 211 2 130;
DEFINE MATERIAL START
ISOTROPIC STEEL
E 2.9e+007
POISSON 0.3
DENSITY 0.283
ALPHA 6e-006
DAMP 0.03
TYPE STEEL
STRENGTH FY 36000 FU 58000 RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
2 3 5 6 8 9 11 12 14 15 17 18 20 21 23 24 26 27 29 30 32 33 TABLE ST W18X192
46 TO 50 59 TO 63 66 67 71 74 TABLE ST W6X15
1 4 7 10 13 22 25 28 31 34 39 TO 43 52 TO 56 64 65 TABLE ST C6X10
16 19 44 45 57 58 69 70 72 73 TABLE ST W12X26
35 TO 38 75 TO 77 TABLE ST L40406
81 84 87 90 93 96 99 102 209 211 TABLE ST L40406
105 TO 122 126 TO 195 TABLE ST PIPS12
CONSTANTS
BETA 45 MEMB 81 84 87 90 93 96 99 102 209 211
MATERIAL STEEL ALL
MEMBER OFFSET
1 4 7 10 13 16 19 22 25 28 31 34 39 TO 50 52 TO 67 69 TO 74 81 84 87 90 93 -
96 99 102 START 0 7 0
1 4 7 10 13 16 19 22 25 28 31 34 39 TO 50 52 TO 67 69 TO 74 81 84 87 90 93 -
96 99 102 END 0 7 0
SUPPORTS
3 4 11 12 17 18 23 24 129 130 FIXED
DEFINE WIND LOAD
TYPE 1 WIND 1
INT 0.6 HEIG  50
EXP 0.3 JOINT 1 TO 40 42 TO 45 50 51 54 55 58 59 62 63 66 67 70 71 74 75 78 -
79 82 TO 99 103 TO 128
DEFINE IBC 2006
ZIP 70084 I 1.25 RX 3 RZ 4 SCLASS 5 CT 0.049 TL 12 FA 2.5 FV 3.5 K 0.75
SELFWEIGHT 1
JOINT WEIGHT
42 TO 45 WEIGHT 1000
FLOOR WEIGHT
YRANGE 0 0 FLOAD 100 XRANGE -0.1 1.18 ZRANGE -0.1 3.1
YRANGE 0 0 FLOAD 100 XRANGE 1.16 11 ZRANGE 0.9 2.14
YRANGE 0 0 FLOAD 100 XRANGE 10.8 14 ZRANGE -0.1 3.1
YRANGE 0 0 FLOAD 500 XRANGE -0.1 1.18 ZRANGE -0.1 3.1
YRANGE 0 0 FLOAD 500 XRANGE 1.16 11 ZRANGE 0.9 2.14
YRANGE 0 0 FLOAD 500 XRANGE 10.8 14 ZRANGE -0.1 3.1
LOAD 1 (SEISMIC LOAD IN X DIRECTION)
IBC LOAD X 0.75
LOAD 2 (SEISMIC LOAD IN Z DIRECTION)
IBC LOAD Z 0.75
LOAD 3 LOADTYPE Dead  TITLE DEAD LOAD
SELFWEIGHT Y -1 LIST 1 TO 50 52 TO 67 69 TO 77 105 TO 122 126 TO 195
JOINT LOAD
42 TO 45 FY -1000
MODAL CALCULATION REQUESTED
UNIT METER KG
FLOOR LOAD
YRANGE 0 0 FLOAD -100 XRANGE -0.1 1.18  ZRANGE -0.1 3.1  GY
YRANGE 0 0 FLOAD -100 XRANGE 1.16 11  ZRANGE 0.9 2.14  GY
YRANGE 0 0 FLOAD -100 XRANGE 10.8 14  ZRANGE -0.1 3.1  GY
UNIT INCHES POUND
LOAD 4 LOADTYPE Live  TITLE LIVE LOAD
UNIT METER KG
FLOOR LOAD
YRANGE 0 0 FLOAD -500 XRANGE -0.1 1.18  ZRANGE -0.1 3.1  GY
YRANGE 0 0 FLOAD -500 XRANGE 1.16 11  ZRANGE 0.9 2.14  GY
YRANGE 0 0 FLOAD -500 XRANGE 10.8 14  ZRANGE -0.1 3.1  GY
LOAD 5 LOADTYPE Wind  TITLE WLX
WIND LOAD X 1 TYPE 1 OPEN
LOAD 6 LOADTYPE Wind  TITLE WLZ
WIND LOAD Z 1 TYPE 1 OPEN
LOAD COMB ABS 7 SLX+DL+LL
1 1.0 3 1.0 4 1.0
LOAD COMB ABS 8 SLZ+DL+LL
2 1.0 3 1.0 4 1.0
LOAD COMB ABS 9 WLX+DL+LL
5 1.0 3 1.0 4 1.0
LOAD COMB ABS 10 WLZ+DL+LL
6 1.0 3 1.0 4 1.0
PERFORM ANALYSIS
PARAMETER 1
CODE AISC UNIFIED
TRACK 2 ALL
DFF 300 MEMB 2 3 5 6 8 9 11 12 14 15 17 18 20 21 23 24 26 27 29 30 32 33
DJ1 1 MEMB 2 5 8 11 14 17 20 23 26 29 32
DJ2 23 MEMB 2 5 8 11 14 17 20 23 26 29 32
DJ1 2 MEMB 3 6 9 12 15 18 21 24 27 30 33
DJ2 24 MEMB 3 6 9 12 15 18 21 24 27 30 33
DFF 300 MEMB 46 TO 50 59 TO 63 66 67 71 74
DJ1 25 MEMB 46 TO 50
DJ2 30 MEMB 46 TO 50
DJ1 32 MEMB 59 TO 63
DJ2 37 MEMB 59 TO 63
DFF 300 MEMB 1 4 7 10 13 22 25 28 31 34 39 TO 43 52 TO 56 64 65 81 84 87 90 -
93 96 99 102
DJ1 1 MEMB 1 39 52
DJ2 2 MEMB 1 39 52
DJ1 3 MEMB 4 40 53
DJ2 4 MEMB 4 40 53
DJ1 5 MEMB 7 41 54
DJ2 6 MEMB 7 41 54
DJ1 7 MEMB 10 42 55
DJ2 8 MEMB 10 42 55
DJ1 9 MEMB 13 43 56
DJ2 10 MEMB 13 43 56
DJ1 15 MEMB 22 64 65
DJ2 16 MEMB 22 64 65
DJ1 17 MEMB 25
DJ2 18 MEMB 25
CHECK CODE ALL
PARAMETER 2
CODE AISC UNIFIED
STEEL TAKE OFF ALL
FINISH