hello, can anyone please help me? i have an error " DENSITY NOT PROVIDED. SELFWEIGHT COMMAND IGNORED". how do I get rid of it?

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 03-Oct-16
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 3.9624 0 0; 3 7.9248 0 0; 4 11.8872 0 0; 5 15.8496 0 0;
6 23.7744 0 0; 7 23.7744 0 4.572; 8 23.7744 0 9.144; 9 23.7744 0 13.716;
10 19.812 0 13.716; 11 15.8496 0 13.716; 12 11.8872 0 13.716;
13 7.9248 0 13.716; 14 3.9624 0 13.716; 15 0 0 13.716; 16 0 0 9.144;
17 0 0 4.572; 18 7.9248 0 4.572; 19 3.9624 0 4.572; 20 11.8872 0 4.572;
21 15.8496 0 4.572; 22 19.812 0 4.572; 23 19.812 0 9.144; 24 15.8496 0 9.144;
25 11.8872 0 9.144; 26 7.9248 0 9.144; 27 3.9624 0 9.144; 28 19.812 0 0;
29 0 3.5 0; 30 3.9624 3.5 0; 31 7.9248 3.5 0; 32 11.8872 3.5 0;
33 15.8496 3.5 0; 34 23.7744 3.5 0; 35 23.7744 3.5 4.572; 36 23.7744 3.5 9.144;
37 23.7744 3.5 13.716; 38 19.812 3.5 13.716; 39 15.8496 3.5 13.716;
40 11.8872 3.5 13.716; 41 7.9248 3.5 13.716; 42 3.9624 3.5 13.716;
43 0 3.5 13.716; 44 0 3.5 9.144; 45 0 3.5 4.572; 46 7.9248 3.5 4.572;
47 3.9624 3.5 4.572; 48 11.8872 3.5 4.572; 49 15.8496 3.5 4.572;
50 19.812 3.5 4.572; 51 19.812 3.5 9.144; 52 15.8496 3.5 9.144;
53 11.8872 3.5 9.144; 54 7.9248 3.5 9.144; 55 3.9624 3.5 9.144;
56 19.812 3.5 0; 57 0 7 0; 58 3.9624 7 0; 59 7.9248 7 0; 60 11.8872 7 0;
61 15.8496 7 0; 62 23.7744 7 0; 63 23.7744 7 4.572; 64 23.7744 7 9.144;
65 23.7744 7 13.716; 66 19.812 7 13.716; 67 15.8496 7 13.716;
68 11.8872 7 13.716; 69 7.9248 7 13.716; 70 3.9624 7 13.716; 71 0 7 13.716;
72 0 7 9.144; 73 0 7 4.572; 74 7.9248 7 4.572; 75 3.9624 7 4.572;
76 11.8872 7 4.572; 77 15.8496 7 4.572; 78 19.812 7 4.572; 79 19.812 7 9.144;
80 15.8496 7 9.144; 81 11.8872 7 9.144; 82 7.9248 7 9.144; 83 3.9624 7 9.144;
84 19.812 7 0; 85 0 10.5 0; 86 3.9624 10.5 0; 87 7.9248 10.5 0;
88 11.8872 10.5 0; 89 15.8496 10.5 0; 90 23.7744 10.5 0; 91 23.7744 10.5 4.572;
92 23.7744 10.5 9.144; 93 23.7744 10.5 13.716; 94 19.812 10.5 13.716;
95 15.8496 10.5 13.716; 96 11.8872 10.5 13.716; 97 7.9248 10.5 13.716;
98 3.9624 10.5 13.716; 99 0 10.5 13.716; 100 0 10.5 9.144; 101 0 10.5 4.572;
102 7.9248 10.5 4.572; 103 3.9624 10.5 4.572; 104 11.8872 10.5 4.572;
105 15.8496 10.5 4.572; 106 19.812 10.5 4.572; 107 19.812 10.5 9.144;
108 15.8496 10.5 9.144; 109 11.8872 10.5 9.144; 110 7.9248 10.5 9.144;
111 3.9624 10.5 9.144; 112 19.812 10.5 0; 113 0 14 0; 114 3.9624 14 0;
115 7.9248 14 0; 116 11.8872 14 0; 117 15.8496 14 0; 118 23.7744 14 0;
119 23.7744 14 4.572; 120 23.7744 14 9.144; 121 23.7744 14 13.716;
122 19.812 14 13.716; 123 15.8496 14 13.716; 124 11.8872 14 13.716;
125 7.9248 14 13.716; 126 3.9624 14 13.716; 127 0 14 13.716; 128 0 14 9.144;
129 0 14 4.572; 130 7.9248 14 4.572; 131 3.9624 14 4.572; 132 11.8872 14 4.572;
133 15.8496 14 4.572; 134 19.812 14 4.572; 135 19.812 14 9.144;
136 15.8496 14 9.144; 137 11.8872 14 9.144; 138 7.9248 14 9.144;
139 3.9624 14 9.144; 140 19.812 14 0;
MEMBER INCIDENCES
45 1 29; 46 2 30; 47 3 31; 48 4 32; 49 5 33; 50 6 34; 51 7 35; 52 8 36;
53 9 37; 54 10 38; 55 11 39; 56 12 40; 57 13 41; 58 14 42; 59 15 43; 60 16 44;
61 17 45; 62 18 46; 63 19 47; 64 20 48; 65 21 49; 66 22 50; 67 23 51; 68 24 52;
69 25 53; 70 26 54; 71 27 55; 72 28 56; 73 29 30; 74 30 31; 75 31 32; 76 32 33;
77 33 56; 78 34 35; 79 35 36; 80 36 37; 81 37 38; 82 38 39; 83 39 40; 84 40 41;
85 41 42; 86 42 43; 87 43 44; 88 44 45; 89 45 29; 90 45 47; 91 47 46; 92 46 48;
93 48 49; 94 49 50; 95 50 35; 96 36 51; 97 51 52; 98 52 53; 99 53 54;
100 54 55; 101 55 44; 102 30 47; 103 47 55; 104 55 42; 105 31 46; 106 46 54;
107 54 41; 108 32 48; 109 53 40; 110 33 49; 111 49 52; 112 52 39; 113 56 34;
114 56 50; 115 50 51; 116 51 38; 117 29 57; 118 30 58; 119 31 59; 120 32 60;
121 33 61; 122 34 62; 123 35 63; 124 36 64; 125 37 65; 126 38 66; 127 39 67;
128 40 68; 129 41 69; 130 42 70; 131 43 71; 132 44 72; 133 45 73; 134 46 74;
135 47 75; 136 48 76; 137 49 77; 138 50 78; 139 51 79; 140 52 80; 141 53 81;
142 54 82; 143 55 83; 144 56 84; 145 57 58; 146 58 59; 147 59 60; 148 60 61;
149 61 84; 150 62 63; 151 63 64; 152 64 65; 153 65 66; 154 66 67; 155 67 68;
156 68 69; 157 69 70; 158 70 71; 159 71 72; 160 72 73; 161 73 57; 162 73 75;
163 75 74; 164 74 76; 165 76 77; 166 77 78; 167 78 63; 168 64 79; 169 79 80;
170 80 81; 171 81 82; 172 82 83; 173 83 72; 174 58 75; 175 75 83; 176 83 70;
177 59 74; 178 74 82; 179 82 69; 180 60 76; 181 81 68; 182 61 77; 183 77 80;
184 80 67; 185 84 62; 186 84 78; 187 78 79; 188 79 66; 189 57 85; 190 58 86;
191 59 87; 192 60 88; 193 61 89; 194 62 90; 195 63 91; 196 64 92; 197 65 93;
198 66 94; 199 67 95; 200 68 96; 201 69 97; 202 70 98; 203 71 99; 204 72 100;
205 73 101; 206 74 102; 207 75 103; 208 76 104; 209 77 105; 210 78 106;
211 79 107; 212 80 108; 213 81 109; 214 82 110; 215 83 111; 216 84 112;
217 85 86; 218 86 87; 219 87 88; 220 88 89; 221 89 112; 222 90 91; 223 91 92;
224 92 93; 225 93 94; 226 94 95; 227 95 96; 228 96 97; 229 97 98; 230 98 99;
231 99 100; 232 100 101; 233 101 85; 234 101 103; 235 103 102; 236 102 104;
237 104 105; 238 105 106; 239 106 91; 240 92 107; 241 107 108; 242 108 109;
243 109 110; 244 110 111; 245 111 100; 246 86 103; 247 103 111; 248 111 98;
249 87 102; 250 102 110; 251 110 97; 252 88 104; 253 109 96; 254 89 105;
255 105 108; 256 108 95; 257 112 90; 258 112 106; 259 106 107; 260 107 94;
261 85 113; 262 86 114; 263 87 115; 264 88 116; 265 89 117; 266 90 118;
267 91 119; 268 92 120; 269 93 121; 270 94 122; 271 95 123; 272 96 124;
273 97 125; 274 98 126; 275 99 127; 276 100 128; 277 101 129; 278 102 130;
279 103 131; 280 104 132; 281 105 133; 282 106 134; 283 107 135; 284 108 136;
285 109 137; 286 110 138; 287 111 139; 288 112 140; 289 113 114; 290 114 115;
291 115 116; 292 116 117; 293 117 140; 294 118 119; 295 119 120; 296 120 121;
297 121 122; 298 122 123; 299 123 124; 300 124 125; 301 125 126; 302 126 127;
303 127 128; 304 128 129; 305 129 113; 306 129 131; 307 131 130; 308 130 132;
309 132 133; 310 133 134; 311 134 119; 312 120 135; 313 135 136; 314 136 137;
315 137 138; 316 138 139; 317 139 128; 318 114 131; 319 131 139; 320 139 126;
321 115 130; 322 130 138; 323 138 125; 324 116 132; 325 137 124; 326 117 133;
327 133 136; 328 136 123; 329 140 118; 330 140 134; 331 134 135; 332 135 122;
START GROUP DEFINITION
MEMBER
_COLUMN 45 TO 72 117 TO 144 189 TO 216 261 TO 288
_BEAMS 73 TO 116 145 TO 188 217 TO 260 289 TO 332
END GROUP DEFINITION
DEFINE MATERIAL START
ISOTROPIC CONCRETE
E 2.17185e+007
POISSON 0.17
DENSITY 23.5616
ALPHA 1e-005
DAMP 0.05
TYPE CONCRETE
STRENGTH FCU 27579
END DEFINE MATERIAL
SUPPORTS
1 TO 28 FIXED
DEFINE 1893 LOAD
ZONE 0.24 RF 5 I 1 SS 2 ST 1 DM 0.05
SELFWEIGHT -1
FLOOR LOAD
YRANGE 3 15 FLOAD 3.5 XRANGE 0 24 ZRANGE 0 4.572
YRANGE 3 15 FLOAD 3.5 XRANGE 0 7.925 ZRANGE 4.572 9.144
YRANGE 3 15 FLOAD 3.5 XRANGE 15.85 25 ZRANGE 4.572 9.144
YRANGE 3 15 FLOAD 3.5 XRANGE 0 24 ZRANGE 9.144 13.716
FLOOR LOAD
YRANGE 0 15 FLOAD 2.5 XRANGE 0 24 ZRANGE 0 4.572
YRANGE 0 15 FLOAD 2.5 XRANGE 0 7.925 ZRANGE 4.572 9.144
YRANGE 0 15 FLOAD 2.5 XRANGE 15.85 24 ZRANGE 4.572 9.144
YRANGE 0 15 FLOAD 2.5 XRANGE 0 24 ZRANGE 9.144 14
LOAD 1 LOADTYPE Seismic TITLE EQ+X
1893 LOAD X 1
LOAD 2 LOADTYPE Seismic TITLE EQ-X
1893 LOAD X -1
LOAD 3 LOADTYPE Seismic TITLE EQ+Z
1893 LOAD Z 1
LOAD 4 LOADTYPE Seismic TITLE EQ-Z
1893 LOAD Z -1
LOAD 5 LOADTYPE Dead TITLE DL
SELFWEIGHT Y -1
FLOOR LOAD
YRANGE 3 15 FLOAD -3.5 XRANGE 0 24 ZRANGE 0 4.572 GY
YRANGE 3 15 FLOAD -3.5 XRANGE 0 7.925 ZRANGE 4.572 9.144 GY
YRANGE 3 15 FLOAD -3.5 XRANGE 15.85 25 ZRANGE 4.572 9.144 GY
YRANGE 3 15 FLOAD -3.5 XRANGE 0 24 ZRANGE 9.144 13.716 GY
LOAD 6 LOADTYPE Live TITLE LIVE
FLOOR LOAD
YRANGE 0 15 FLOAD -2.5 XRANGE 0 24 ZRANGE 0 4.572 GY
YRANGE 0 15 FLOAD -2.5 XRANGE 0 7.925 ZRANGE 4.572 9.144 GY
YRANGE 0 15 FLOAD -2.5 XRANGE 15.85 24 ZRANGE 4.572 9.144 GY
YRANGE 0 15 FLOAD -2.5 XRANGE 0 24 ZRANGE 9.144 14 GY
PERFORM ANALYSIS PRINT ALL
FINISH