**WARNING - COMMAND REQUIRES SECTION FORCES, HOWEVER NO CASES ARE SOLVED YET.

It would be great if you can share the STAAD file.

But, just a guess, is there any Mass reference load case ahead of floor diaphragm? If not can you place it and see what happens?

hello could you please help me whats the problem in my staad file. it says "beam failure in RCDC" 1641.Structure1.STD

Can you please attach the RCDC file (.rcdx). Also you can check the reason of failure by clicking the failure diagnostic option available under Report Tab. 

hello. regarding column design, it says failure in shear and detailing. can you please fix this  I UPLOADED THE STAAD AND RCDC FILE6052.Structure1.STDCOLUM CALCULATION.rar

STAAD SPACE DXF IMPORT OF DRAWING6.DXF
START JOB INFORMATION
ENGINEER DATE 15-May-21
END JOB INFORMATION
INPUT WIDTH 79
SET NL 4
UNIT METER KN
JOINT COORDINATES
1 22.6487 0 -32.3117; 2 26.6487 0 -32.3117; 3 30.6487 0 -32.3117;
4 34.6487 0 -32.3117; 5 38.6487 0 -32.3117; 6 22.6487 0 -29.8117;
7 26.6487 0 -29.8117; 8 30.6487 0 -29.8117; 9 34.6487 0 -29.8117;
10 38.6487 0 -29.8117; 11 22.6487 0 -27.3117; 12 26.6487 0 -27.3117;
13 30.6487 0 -27.3117; 14 34.6487 0 -27.3117; 15 38.6487 0 -27.3117;
16 22.6487 0 -24.8117; 17 26.6487 0 -24.8117; 18 30.6487 0 -24.8117;
19 34.6487 0 -24.8117; 20 38.6487 0 -24.8117; 21 22.6487 0 -22.3117;
22 26.6487 0 -22.3117; 23 30.6487 0 -22.3117; 24 34.6487 0 -22.3117;
25 38.6487 0 -22.3117; 26 22.6487 0 -19.8117; 27 26.6487 0 -19.8117;
28 30.6487 0 -19.8117; 29 34.6487 0 -19.8117; 30 38.6487 0 -19.8117;
31 22.6487 0 -17.3117; 32 26.6487 0 -17.3117; 33 30.6487 0 -17.3117;
34 34.6487 0 -17.3117; 35 38.6487 0 -17.3117; 36 22.6487 0 -14.3117;
37 26.6487 0 -14.3117; 38 26.6487 0 -13.3117; 39 30.6487 0 -13.3117;
40 34.6487 0 -13.3117; 41 38.6487 0 -13.3117; 42 22.6487 0 -13.3117;
43 22.6487 0 -10.3117; 44 26.6487 0 -10.3117; 45 30.6487 0 -10.3117;
46 34.6487 0 -10.3117; 47 38.6487 0 -10.3117; 48 22.6487 0 -7.31165;
49 26.6487 0 -7.31165; 50 30.6487 0 -7.31165; 51 34.6487 0 -7.31165;
52 38.6487 0 -7.31165; 53 22.6487 3.4 -32.3117; 54 26.6487 3.4 -32.3117;
55 30.6487 3.4 -32.3117; 56 34.6487 3.4 -32.3117; 57 38.6487 3.4 -32.3117;
58 22.6487 3.4 -29.8117; 59 26.6487 3.4 -29.8117; 60 30.6487 3.4 -29.8117;
61 34.6487 3.4 -29.8117; 62 38.6487 3.4 -29.8117; 63 22.6487 3.4 -27.3117;
64 26.6487 3.4 -27.3117; 65 30.6487 3.4 -27.3117; 66 34.6487 3.4 -27.3117;
67 38.6487 3.4 -27.3117; 68 22.6487 3.4 -24.8117; 69 26.6487 3.4 -24.8117;
70 30.6487 3.4 -24.8117; 71 34.6487 3.4 -24.8117; 72 38.6487 3.4 -24.8117;
73 22.6487 3.4 -22.3117; 74 26.6487 3.4 -22.3117; 75 30.6487 3.4 -22.3117;
76 34.6487 3.4 -22.3117; 77 38.6487 3.4 -22.3117; 78 22.6487 3.4 -19.8117;
79 26.6487 3.4 -19.8117; 80 30.6487 3.4 -19.8117; 81 34.6487 3.4 -19.8117;
82 38.6487 3.4 -19.8117; 83 22.6487 3.4 -17.3117; 84 26.6487 3.4 -17.3117;
85 30.6487 3.4 -17.3117; 86 34.6487 3.4 -17.3117; 87 38.6487 3.4 -17.3117;
88 22.6487 3.4 -14.3117; 89 26.6487 3.4 -14.3117; 90 26.6487 3.4 -13.3117;
91 30.6487 3.4 -13.3117; 92 34.6487 3.4 -13.3117; 93 38.6487 3.4 -13.3117;
94 22.6487 3.4 -13.3117; 95 22.6487 3.4 -10.3117; 96 26.6487 3.4 -10.3117;
97 30.6487 3.4 -10.3117; 98 34.6487 3.4 -10.3117; 99 38.6487 3.4 -10.3117;
100 22.6487 3.4 -7.31165; 101 26.6487 3.4 -7.31165; 102 30.6487 3.4 -7.31165;
103 34.6487 3.4 -7.31165; 104 38.6487 3.4 -7.31165; 105 22.6487 6.8 -32.3117;
106 26.6487 6.8 -32.3117; 107 30.6487 6.8 -32.3117; 108 34.6487 6.8 -32.3117;
109 38.6487 6.8 -32.3117; 110 22.6487 6.8 -29.8117; 111 26.6487 6.8 -29.8117;
112 30.6487 6.8 -29.8117; 113 34.6487 6.8 -29.8117; 114 38.6487 6.8 -29.8117;
115 22.6487 6.8 -27.3117; 116 26.6487 6.8 -27.3117; 117 30.6487 6.8 -27.3117;
118 34.6487 6.8 -27.3117; 119 38.6487 6.8 -27.3117; 120 22.6487 6.8 -24.8117;
121 26.6487 6.8 -24.8117; 122 30.6487 6.8 -24.8117; 123 34.6487 6.8 -24.8117;
124 38.6487 6.8 -24.8117; 125 22.6487 6.8 -22.3117; 126 26.6487 6.8 -22.3117;
127 30.6487 6.8 -22.3117; 128 34.6487 6.8 -22.3117; 129 38.6487 6.8 -22.3117;
130 22.6487 6.8 -19.8117; 131 26.6487 6.8 -19.8117; 132 30.6487 6.8 -19.8117;
133 34.6487 6.8 -19.8117; 134 38.6487 6.8 -19.8117; 135 22.6487 6.8 -17.3117;
136 26.6487 6.8 -17.3117; 137 30.6487 6.8 -17.3117; 138 34.6487 6.8 -17.3117;
139 38.6487 6.8 -17.3117; 140 22.6487 6.8 -14.3117; 141 26.6487 6.8 -14.3117;
142 26.6487 6.8 -13.3117; 143 30.6487 6.8 -13.3117; 144 34.6487 6.8 -13.3117;
145 38.6487 6.8 -13.3117; 146 22.6487 6.8 -13.3117; 147 22.6487 6.8 -10.3117;
148 26.6487 6.8 -10.3117; 149 30.6487 6.8 -10.3117; 150 34.6487 6.8 -10.3117;
151 38.6487 6.8 -10.3117; 152 22.6487 6.8 -7.31165; 153 26.6487 6.8 -7.31165;
154 30.6487 6.8 -7.31165; 155 34.6487 6.8 -7.31165; 156 38.6487 6.8 -7.31165;
157 22.6487 -3.6 -32.3117; 158 26.6487 -3.6 -32.3117;
159 30.6487 -3.6 -32.3117; 160 34.6487 -3.6 -32.3117;
161 38.6487 -3.6 -32.3117; 167 22.6487 -3.6 -27.3117;
168 26.6487 -3.6 -27.3117; 169 30.6487 -3.6 -27.3117;
170 34.6487 -3.6 -27.3117; 171 38.6487 -3.6 -27.3117;
177 22.6487 -3.6 -22.3117; 178 26.6487 -3.6 -22.3117;
179 30.6487 -3.6 -22.3117; 180 34.6487 -3.6 -22.3117;
181 38.6487 -3.6 -22.3117; 187 22.6487 -3.6 -17.3117;
188 26.6487 -3.6 -17.3117; 189 30.6487 -3.6 -17.3117;
190 34.6487 -3.6 -17.3117; 191 38.6487 -3.6 -17.3117;
194 26.6487 -3.6 -13.3117; 195 30.6487 -3.6 -13.3117;
196 34.6487 -3.6 -13.3117; 197 38.6487 -3.6 -13.3117;
198 22.6487 -3.6 -13.3117; 204 22.6487 -3.6 -7.31165;
205 26.6487 -3.6 -7.31165; 206 30.6487 -3.6 -7.31165;
207 34.6487 -3.6 -7.31165; 208 38.6487 -3.6 -7.31165; 209 22.6487 7.9 -32.3117;
210 26.6487 7.9 -32.3117; 211 30.6487 7.9 -32.3117; 212 34.6487 7.9 -32.3117;
213 38.6487 7.9 -32.3117; 219 22.6487 7.9 -27.3117; 223 38.6487 7.9 -27.3117;
229 22.6487 7.9 -22.3117; 233 38.6487 7.9 -22.3117; 239 22.6487 7.9 -17.3117;
243 38.6487 7.9 -17.3117; 248 34.6487 7.9 -13.3117; 249 38.6487 7.9 -13.3117;
250 22.6487 7.9 -13.3117; 256 22.6487 7.9 -7.31165; 257 26.6487 7.9 -7.31165;
258 30.6487 7.9 -7.31165; 259 34.6487 7.9 -7.31165; 260 38.6487 7.9 -7.31165;
261 38.6487 10 -13.3117; 262 34.6487 10 -13.3117;
MEMBER INCIDENCES
1 1 2; 2 2 3; 3 3 4; 4 4 5; 5 1 6; 6 6 7; 7 7 8; 8 8 9; 9 9 10; 10 2 7; 11 3 8;
12 4 9; 13 5 10; 14 6 11; 15 11 12; 16 12 13; 17 13 14; 18 14 15; 19 15 10;
20 7 12; 21 8 13; 22 9 14; 23 11 16; 24 16 17; 25 17 18; 26 18 19; 27 19 20;
28 20 15; 29 12 17; 30 13 18; 31 14 19; 32 16 21; 33 21 22; 34 22 23; 35 23 24;
36 24 25; 37 25 20; 38 17 22; 39 18 23; 40 19 24; 41 21 26; 42 26 27; 43 27 28;
44 28 29; 45 29 30; 46 30 25; 47 22 27; 48 23 28; 49 24 29; 50 26 31; 51 31 32;
52 32 33; 53 33 34; 54 34 35; 55 35 30; 56 27 32; 57 28 33; 58 29 34; 59 31 36;
60 36 37; 61 37 32; 62 37 38; 63 38 39; 64 39 40; 65 40 41; 66 41 35; 67 33 39;
68 34 40; 69 36 42; 70 42 43; 71 43 44; 72 44 45; 73 45 46; 74 46 47; 75 47 41;
76 40 46; 77 39 45; 78 38 44; 79 43 48; 80 48 49; 81 49 50; 82 50 51; 83 51 52;
84 52 47; 85 46 51; 86 45 50; 87 44 49; 88 53 54; 89 54 55; 90 55 56; 91 56 57;
92 53 58; 93 58 59; 94 59 60; 95 60 61; 96 61 62; 97 54 59; 98 55 60; 99 56 61;
100 57 62; 101 58 63; 102 63 64; 103 64 65; 104 65 66; 105 66 67; 106 67 62;
107 59 64; 108 60 65; 109 61 66; 110 63 68; 111 68 69; 112 69 70; 113 70 71;
114 71 72; 115 72 67; 116 64 69; 117 65 70; 118 66 71; 119 68 73; 120 73 74;
121 74 75; 122 75 76; 123 76 77; 124 77 72; 125 69 74; 126 70 75; 127 71 76;
128 73 78; 129 78 79; 130 79 80; 131 80 81; 132 81 82; 133 82 77; 134 74 79;
135 75 80; 136 76 81; 137 78 83; 138 83 84; 139 84 85; 140 85 86; 141 86 87;
142 87 82; 143 79 84; 144 80 85; 145 81 86; 146 83 88; 147 88 89; 148 89 84;
149 89 90; 150 90 91; 151 91 92; 152 92 93; 153 93 87; 154 85 91; 155 86 92;
156 88 94; 157 94 95; 158 95 96; 159 96 97; 160 97 98; 161 98 99; 162 99 93;
163 92 98; 164 91 97; 165 90 96; 166 95 100; 167 100 101; 168 101 102;
169 102 103; 170 103 104; 171 104 99; 172 98 103; 173 97 102; 174 96 101;
175 53 1; 176 54 2; 177 55 3; 178 56 4; 179 57 5; 180 63 11; 181 73 21;
182 100 48; 183 104 52; 184 67 15; 185 77 25; 186 87 35; 187 101 49;
188 102 50; 189 103 51; 190 83 31; 191 42 94; 193 86 34; 194 85 33; 195 84 32;
196 64 12; 197 65 13; 198 66 14; 200 75 23; 201 74 22; 202 93 41; 203 92 40;
204 91 39; 205 90 38; 206 105 106; 207 106 107; 208 107 108; 209 108 109;
210 105 110; 211 110 111; 212 111 112; 213 112 113; 214 113 114; 215 106 111;
216 107 112; 217 108 113; 218 109 114; 219 110 115; 220 115 116; 221 116 117;
222 117 118; 223 118 119; 224 119 114; 225 111 116; 226 112 117; 227 113 118;
228 115 120; 229 120 121; 230 121 122; 231 122 123; 232 123 124; 233 124 119;
234 116 121; 235 117 122; 236 118 123; 237 120 125; 238 125 126; 239 126 127;
240 127 128; 241 128 129; 242 129 124; 243 121 126; 244 122 127; 245 123 128;
246 125 130; 247 130 131; 248 131 132; 249 132 133; 250 133 134; 251 134 129;
252 126 131; 253 127 132; 254 128 133; 255 130 135; 256 135 136; 257 136 137;
258 137 138; 259 138 139; 260 139 134; 261 131 136; 262 132 137; 263 133 138;
264 135 140; 265 140 141; 266 141 136; 267 141 142; 268 142 143; 269 143 144;
270 144 145; 271 145 139; 272 137 143; 273 138 144; 274 140 146; 275 146 147;
276 147 148; 277 148 149; 278 149 150; 279 150 151; 280 151 145; 281 144 150;
282 143 149; 283 142 148; 284 147 152; 285 152 153; 286 153 154; 287 154 155;
288 155 156; 289 156 151; 290 150 155; 291 149 154; 292 148 153; 293 105 53;
294 109 57; 295 108 56; 296 107 55; 297 106 54; 298 115 63; 299 119 67;
300 156 104; 301 155 103; 302 154 102; 303 153 101; 304 152 100; 305 145 93;
306 144 92; 307 143 91; 308 142 90; 309 146 94; 310 117 65; 311 116 64;
312 125 73; 313 126 74; 314 129 77; 315 127 75; 316 139 87; 317 138 86;
318 136 84; 319 135 83; 407 52 208; 408 51 207; 409 50 206; 410 49 205;
411 48 204; 412 41 197; 413 40 196; 414 39 195; 415 38 194; 416 42 198;
417 35 191; 418 34 190; 419 33 189; 420 32 188; 421 31 187; 422 25 181;
423 24 180; 424 23 179; 425 22 178; 426 21 177; 427 15 171; 428 14 170;
429 13 169; 430 12 168; 431 11 167; 432 5 161; 433 4 160; 434 3 159; 435 2 158;
436 1 157; 521 213 109; 522 212 108; 523 211 107; 524 210 106; 525 209 105;
526 223 119; 527 233 129; 528 243 139; 529 260 156; 530 249 145; 531 256 152;
532 259 155; 533 258 154; 534 257 153; 535 219 115; 536 229 125; 537 239 135;
538 250 146; 539 261 249; 540 262 248; 541 248 144;
START GROUP DEFINITION
FLOOR
_TWOWAYSLAB 1 TO 87
_TWOWAYSLAB3 88 TO 174
_TWOWAYSLAB4 206 TO 292
_FINAL 1 TO 64 67 TO 74 76 TO 151 154 TO 161 163 TO 174 206 TO 269 -
272 TO 279 281 TO 292
END GROUP DEFINITION
DEFINE MATERIAL START
ISOTROPIC 3000PSI
E 2.1538e+07
POISSON 0.17
DENSITY 23.5616
ALPHA 1e-05
DAMP 0.05
G 9.28141e+06
TYPE CONCRETE
STRENGTH FCU 21000
END DEFINE MATERIAL
CONSTANTS
MATERIAL 3000PSI ALL
MEMBER PROPERTY AMERICAN
175 TO 191 193 TO 198 200 TO 205 293 TO 319 407 TO 436 521 TO 540 -
541 PRIS YD 0.4 ZD 0.4
1 TO 174 PRIS YD 0.4 ZD 0.35
206 TO 292 PRIS YD 0.35 ZD 0.25
MEMBER CRACKED
175 TO 191 193 TO 198 200 TO 205 293 TO 319 407 TO 436 521 TO 540 -
541 REDUCTION RIY 0.700000 RIZ 0.700000
1 TO 174 206 TO 292 REDUCTION RIY 0.350000 RIZ 0.350000
MEMBER RELEASE
6 TO 9 24 TO 27 42 TO 45 60 71 TO 74 93 TO 96 111 TO 114 129 TO 132 147 158 -
159 TO 161 211 TO 214 229 TO 232 247 TO 250 265 276 TO 279 START MX MY MZ
6 TO 9 24 TO 27 42 TO 45 60 71 TO 74 93 TO 96 111 TO 114 129 TO 132 147 158 -
159 TO 161 211 TO 214 229 TO 232 247 TO 250 265 276 TO 279 END MX MY MZ
SUPPORTS
157 TO 161 167 TO 171 177 TO 181 187 TO 191 194 TO 198 204 TO 208 FIXED
DEFINE REFERENCE LOADS
LOAD R1 LOADTYPE Dead TITLE DEADLOAD
SELFWEIGHT Y 1
MEMBER LOAD
1 TO 5 10 12 TO 20 22 TO 25 27 28 32 TO 34 37 TO 41 46 TO 62 64 TO 70 75 77 -
79 TO 84 86 90 91 98 100 106 108 115 117 120 TO 124 126 128 133 137 138 141 -
142 146 TO 153 155 TO 157 161 TO 164 166 TO 168 173 259 271 273 279 TO 280 -
281 UNI GY 7.59968
206 TO 210 218 219 224 228 233 237 242 246 251 255 260 264 274 275 -
284 TO 289 UNI GY 2.45872
88 89 92 101 110 119 169 TO 171 UNI GY 1
FLOOR LOAD
_FINAL FLOAD 3 GY
END DEFINE REFERENCE LOADS
FLOOR DIAPHRAGM
DIA 1 TYPE RIG HEI 0
DIA 2 TYPE RIG HEI 3.4
DIA 3 TYPE RIG HEI 6.8
CHECK SOFT STORY ASCE7
CHECK SOFT STORY ASCE7
CHECK SOFT STORY
DEFINE UBC LOAD
ZONE 4 I 1 RWX 8.5 RWZ 8.5 STYP 4 NA 1.29 NV 1.72
REFERENCE LOAD Y
R1 1.0
LOAD 1 LOADTYPE Seismic TITLE SL X+
UBC LOAD X 1 DEC 1 ACC 0.05
PERFORM ANALYSIS
CHANGE
LOAD 2 LOADTYPE Seismic TITLE SL Z+
UBC LOAD Z 1 DEC 1 ACC 0.05
PERFORM ANALYSIS
CHANGE
LOAD 3 LOADTYPE Dead TITLE DL
REFERENCE LOAD
R1 1.0
LOAD 4 LOADTYPE Live
FLOOR LOAD
_FINAL FLOAD -1.9 GY
LOAD 34 LOADTYPE Seismic TITLE SL X-
UBC LOAD X -1 DEC 1 ACC 0.05
LOAD 35 LOADTYPE Seismic TITLE SL Z-
UBC LOAD Z -1 DEC 1 ACC 0.05
PERFORM ANALYSIS
CHANGE
PERFORM ANALYSIS
CHANGE
LOAD COMB 5 ULC, 1.4 DEAD
3 1.4
LOAD COMB 6 ULC, 1.2 DEAD + 1.6 LIVE
3 1.2 4 1.6
LOAD COMB 7 ULC, 1.2 DEAD + 0.5 LIVE
3 1.2 4 0.5
LOAD COMB 8 ULC, 1.2 DEAD
3 1.2
LOAD COMB 9 ULC, 1.2 DEAD + 0.5 LIVE + 1 SEISMIC (1)
3 1.2 4 0.5 1 1.0
LOAD COMB 10 ULC, 1.2 DEAD + 0.5 LIVE + 1 SEISMIC (2)
3 1.2 4 0.5 2 1.0
LOAD COMB 11 ULC, 1.2 DEAD + 0.5 LIVE + -1 SEISMIC (1)
3 1.2 4 0.5 1 -1.0
LOAD COMB 12 ULC, 1.2 DEAD + 0.5 LIVE + -1 SEISMIC (2)
3 1.2 4 0.5 2 -1.0
LOAD COMB 13 ULC, 0.9 DEAD
3 0.9
LOAD COMB 14 ULC, 0.9 DEAD + 1 SEISMIC (1)
3 0.9 1 1.0
LOAD COMB 15 ULC, 0.9 DEAD + 1 SEISMIC (2)
3 0.9 2 1.0
LOAD COMB 16 ULC, 0.9 DEAD + -1 SEISMIC (1)
3 0.9 1 -1.0
LOAD COMB 17 ULC, 0.9 DEAD + -1 SEISMIC (2)
3 0.9 2 -1.0
LOAD COMB 18 ULC, 1 DEAD
3 1.0
LOAD COMB 19 ULC, 1 DEAD + 1 LIVE
3 1.0 4 1.0
LOAD COMB 20 ULC, 1 DEAD + 0.75 LIVE
3 1.0 4 0.75
LOAD COMB 21 ULC, 1 DEAD + 0.7 SEISMIC (1)
3 1.0 1 0.7
LOAD COMB 22 ULC, 1 DEAD + 0.7 SEISMIC (2)
3 1.0 2 0.7
LOAD COMB 23 ULC, 1 DEAD + -0.7 SEISMIC (1)
3 1.0 1 -0.7
LOAD COMB 24 ULC, 1 DEAD + -0.7 SEISMIC (2)
3 1.0 2 -0.7
LOAD COMB 25 ULC, 1 DEAD + 0.75 LIVE + 0.525 SEISMIC (1)
3 1.0 4 0.75 1 0.525
LOAD COMB 26 ULC, 1 DEAD + 0.75 LIVE + 0.525 SEISMIC (2)
3 1.0 4 0.75 2 0.525
LOAD COMB 27 ULC, 1 DEAD + 0.75 LIVE + -0.525 SEISMIC (1)
3 1.0 4 0.75 1 -0.525
LOAD COMB 28 ULC, 1 DEAD + 0.75 LIVE + -0.525 SEISMIC (2)
3 1.0 4 0.75 2 -0.525
LOAD COMB 29 ULC, 0.6 DEAD
3 0.6
LOAD COMB 30 ULC, 0.6 DEAD + 0.7 SEISMIC (1)
3 0.6 1 0.7
LOAD COMB 31 ULC, 0.6 DEAD + 0.7 SEISMIC (2)
3 0.6 2 0.7
LOAD COMB 32 ULC, 0.6 DEAD + -0.7 SEISMIC (1)
3 0.6 1 -0.7
LOAD COMB 33 ULC, 0.6 DEAD + -0.7 SEISMIC (2)
3 0.6 2 -0.7
PDELTA 10 ANALYSIS SMALLDELTA
DEFINE ENVELOPE
5 TO 17 ENVELOPE 1 TYPE STRENGTH
18 TO 33 ENVELOPE 2 TYPE SERVICEABILITY
END DEFINE ENVELOPE
PERFORM ANALYSIS
FINISH

pelase help me. same goes to me :(