ERROR: NO REFERENCE LOAD CASE OF TYPE MASS/GRIVITY/DEAD/LIVE IS DEFINED FOR MASS MODELING. CENTRE OF MASS CALCULATION IS NOT POSSIBLE.

You need to provide "Type" for reference load used in the file. You have provided "None" as type and hence program is unable to calculate centre of mass. Please change it to mass or gravity to overcome this issue.

/resized-image/__size/1040x731/__key/communityserver-discussions-components-files/5932/pastedimage1542947260770v1.png

Also you have used "load case#2" two times. please change the first one to #1.

Could you help me this? Thank you.

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 16-Jan-23
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 3.1 0 0; 3 6.2 0 0; 4 0 0 3.05; 5 6.2 0 3.05; 6 0 0 3.05;
7 0 0 6.75; 8 6.2 0 6.75; 9 0 0 10.45; 10 3.1 0 11.45; 11 6.2 0 11.45;
12 0 0 15; 13 3.1 0 15; 14 6.2 0 15; 15 0 3.1 0; 16 3.1 3.1 0; 17 6.2 3.1 0;
18 0 3.1 3.05; 19 6.2 3.1 3.05; 20 0 3.1 3.05; 21 0 3.1 6.75; 22 6.2 3.1 6.75;
23 0 3.1 10.45; 24 3.1 3.1 11.45; 25 6.2 3.1 11.45; 26 0 3.1 15; 27 3.1 3.1 15;
28 6.2 3.1 15; 29 3.1 3.1 3.05; 30 3.1 3.1 6.75; 31 3.1 3.1 10.45;
32 0 3.1 11.45; 33 0 6.1 0; 34 3.1 6.1 0; 35 6.2 6.1 0; 36 0 6.1 3.05;
37 6.2 6.1 3.05; 38 0 6.1 3.05; 39 0 6.1 6.75; 40 6.2 6.1 6.75; 41 0 6.1 10.45;
42 3.1 6.1 11.45; 43 6.2 6.1 11.45; 44 0 6.1 15; 45 3.1 6.1 15; 46 6.2 6.1 15;
47 3.1 6.1 3.05; 48 3.1 6.1 6.75; 49 0 6.1 11.45; 50 -0.6 3.1 0;
51 -0.6 3.1 3.05; 52 -0.6 3.1 6.75; 53 -0.6 3.1 10.45; 54 -0.6 3.1 13.1;
55 0 3.1 13.1; 56 0.8 3.1 15; 57 3.1 3.1 15.6; 58 6.2 3.1 15.6;
59 0.8 3.1 15.6; 60 -0.6 6.1 0; 61 -0.6 6.1 3.05; 62 -0.6 6.1 6.75;
63 -0.6 6.1 10.45; 64 3.1 6.1 15.6; 65 6.2 6.1 15.6; 66 -0.6 6.1 15.6;
MEMBER INCIDENCES
1 1 15; 2 2 16; 3 3 17; 4 4 18; 5 5 19; 6 7 21; 7 8 22; 8 9 23; 9 10 24;
10 11 25; 11 12 26; 12 13 27; 13 14 28; 14 15 18; 15 18 21; 16 21 23; 17 23 32;
18 16 29; 19 24 27; 20 17 19; 21 19 22; 22 22 25; 23 25 28; 24 15 16; 25 16 17;
26 29 30; 27 30 31; 28 18 29; 29 29 19; 30 21 30; 31 30 22; 32 31 24; 33 23 31;
34 32 55; 35 32 24; 36 24 25; 37 26 56; 38 27 28; 39 15 33; 40 16 34; 41 17 35;
42 18 36; 43 19 37; 44 21 39; 45 22 40; 46 23 41; 47 24 42; 48 25 43; 49 26 44;
50 27 45; 51 28 46; 52 33 36; 53 36 39; 54 39 41; 55 41 49; 56 34 47; 57 42 45;
58 35 37; 59 37 40; 60 40 43; 61 43 46; 62 33 34; 63 34 35; 64 47 48; 65 36 47;
66 47 37; 67 39 48; 68 48 40; 69 49 44; 70 49 42; 71 42 43; 72 44 45; 73 45 46;
74 48 42; 75 50 51; 76 51 52; 77 52 53; 78 53 54; 79 55 26; 80 50 15; 81 51 18;
82 52 21; 83 53 23; 84 54 55; 85 56 27; 86 59 57; 87 57 58; 88 56 59; 89 27 57;
90 28 58; 91 60 61; 92 61 62; 93 62 63; 94 64 65; 95 63 66; 96 66 64; 97 60 33;
98 61 36; 99 62 39; 100 63 41; 101 45 64; 102 46 65;
START GROUP DEFINITION
FLOOR
_FLR 14 TO 16 18 TO 38 79 85
_SDL 14 TO 16 18 TO 38 79 85
_RD 52 TO 74
_RDSDL 52 TO 74
_ONEFLR 17 32 33 35
_ONESDL 17 32 33 35
_ROOM 14 15 18 TO 21 23 TO 26 28 TO 31 34 TO 38 79 85
_BALCON 16 27 30 33
_AS_ST 22 27 31 32 36
_ONEROOM 17 32 33 35
_STRD 54 55 60 67 68 70 71 74
_BALCONRD 52 53 56 58 59 61 TO 73
MEMBER
_CHB 14 TO 17 20 TO 25 34 37 38 54 55 60 67 68 70 71 79 85
_CHBINT 28 TO 31 33 35 36
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
ISOTROPIC 20.7MPA
E 2.1384e+007
POISSON 0.17
DENSITY 24
ALPHA 1e-005
DAMP 0.05
G 9.28139e+006
TYPE CONCRETE
STRENGTH FCU 20700
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
1 TO 13 39 TO 51 PRIS YD 0.3 ZD 0.3
14 TO 38 52 TO 74 79 85 PRIS YD 0.35 ZD 0.2
MEMBER PROPERTY AMERICAN
75 TO 78 80 TO 84 86 TO 102 PRIS YD 0.3 ZD 0.2
CONSTANTS
MATERIAL 20.7MPA ALL
MEMBER RELEASE
35 70 75 81 TO 83 86 88 96 TO 100 START MZ
33 78 84 87 89 94 101 END MZ
MEMBER CRACKED
1 TO 13 39 TO 51 REDUCTION RIY 0.700000 RIZ 0.700000
14 TO 38 52 TO 102 REDUCTION RIY 0.350000 RIZ 0.350000
FLOOR DIAPHRAGM
DIA 1 TYPE RIG HEI 3.1 JOINT 15 TO 32 50 TO 59
DIA 2 TYPE RIG HEI 6.1 JOINT 33 TO 49 60 TO 66
SUPPORTS
1 TO 14 FIXED
DEFINE REFERENCE LOADS
LOAD R1 LOADTYPE Mass TITLE DL
SELFWEIGHT Y 1 LIST ALL
FLOOR LOAD
_FLR FLOAD 2.4 GY
_SDL FLOAD 5 GY
_RD FLOAD 2.4 GY
_RDSDL FLOAD 5 GY
ONEWAY LOAD
_ONEFLR ONE 2.4 GY
_ONESDL ONE 5 GY
MEMBER LOAD
14 TO 17 20 TO 25 34 37 38 54 55 60 67 68 70 71 79 85 UNI GY 10
28 TO 31 33 35 36 UNI GY 9.6
END DEFINE REFERENCE LOADS
DEFINE UBC LOAD
ZONE 0.4 I 1.5 RWX 8.5 RWZ 8.5 STYP 4 CT 0.0731 PX 0.284 PZ 0.284 NA 1 NV 1
LOAD 1 LOADTYPE Seismic TITLE EQ +X +E
UBC LOAD X 1 DEC 1 ACC 0.05
LOAD 2 LOADTYPE Seismic TITLE EQ +X -E
UBC LOAD X 1 DEC 1 ACC -0.05
LOAD 3 LOADTYPE Seismic TITLE EQ -X +E
UBC LOAD X -1 DEC 1 ACC 0.05
LOAD 4 LOADTYPE Seismic TITLE EQ -X -E
UBC LOAD X -1 DEC 1 ACC -0.05
LOAD 5 LOADTYPE Seismic TITLE EQ +Z +E
UBC LOAD Z 1 DEC 1 ACC 0.05
LOAD 6 LOADTYPE Seismic TITLE EQ +Z -E
UBC LOAD Z 1 DEC 1 ACC -0.05
LOAD 7 LOADTYPE Seismic TITLE EQ -Z +E
UBC LOAD Z -1 DEC 1 ACC 0.05
LOAD 8 LOADTYPE Seismic TITLE EQ -Z -E
UBC LOAD Z -1 DEC 1 ACC -0.05
LOAD 9 LOADTYPE Dead TITLE DL
REFERENCE LOAD
R1 -1.0
LOAD 10 LOADTYPE Live TITLE LL
FLOOR LOAD
_ROOM FLOAD -2.4 GY
ONEWAY LOAD
_ONEROOM ONE -2.4 GY
FLOOR LOAD
_BALCON FLOAD -2.9 GY
_AS_ST FLOAD -4.8 GY
LOAD 11 LOADTYPE Roof Live TITLE LLR
FLOOR LOAD
_STRD FLOAD -4.8 GY
_BALCONRD FLOAD -2.9 GY
PERFORM ANALYSIS
FINISH

Could you help me this? Thank you.

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 16-Jan-23
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 3.1 0 0; 3 6.2 0 0; 4 0 0 3.05; 5 6.2 0 3.05; 6 0 0 3.05;
7 0 0 6.75; 8 6.2 0 6.75; 9 0 0 10.45; 10 3.1 0 11.45; 11 6.2 0 11.45;
12 0 0 15; 13 3.1 0 15; 14 6.2 0 15; 15 0 3.1 0; 16 3.1 3.1 0; 17 6.2 3.1 0;
18 0 3.1 3.05; 19 6.2 3.1 3.05; 20 0 3.1 3.05; 21 0 3.1 6.75; 22 6.2 3.1 6.75;
23 0 3.1 10.45; 24 3.1 3.1 11.45; 25 6.2 3.1 11.45; 26 0 3.1 15; 27 3.1 3.1 15;
28 6.2 3.1 15; 29 3.1 3.1 3.05; 30 3.1 3.1 6.75; 31 3.1 3.1 10.45;
32 0 3.1 11.45; 33 0 6.1 0; 34 3.1 6.1 0; 35 6.2 6.1 0; 36 0 6.1 3.05;
37 6.2 6.1 3.05; 38 0 6.1 3.05; 39 0 6.1 6.75; 40 6.2 6.1 6.75; 41 0 6.1 10.45;
42 3.1 6.1 11.45; 43 6.2 6.1 11.45; 44 0 6.1 15; 45 3.1 6.1 15; 46 6.2 6.1 15;
47 3.1 6.1 3.05; 48 3.1 6.1 6.75; 49 0 6.1 11.45; 50 -0.6 3.1 0;
51 -0.6 3.1 3.05; 52 -0.6 3.1 6.75; 53 -0.6 3.1 10.45; 54 -0.6 3.1 13.1;
55 0 3.1 13.1; 56 0.8 3.1 15; 57 3.1 3.1 15.6; 58 6.2 3.1 15.6;
59 0.8 3.1 15.6; 60 -0.6 6.1 0; 61 -0.6 6.1 3.05; 62 -0.6 6.1 6.75;
63 -0.6 6.1 10.45; 64 3.1 6.1 15.6; 65 6.2 6.1 15.6; 66 -0.6 6.1 15.6;
MEMBER INCIDENCES
1 1 15; 2 2 16; 3 3 17; 4 4 18; 5 5 19; 6 7 21; 7 8 22; 8 9 23; 9 10 24;
10 11 25; 11 12 26; 12 13 27; 13 14 28; 14 15 18; 15 18 21; 16 21 23; 17 23 32;
18 16 29; 19 24 27; 20 17 19; 21 19 22; 22 22 25; 23 25 28; 24 15 16; 25 16 17;
26 29 30; 27 30 31; 28 18 29; 29 29 19; 30 21 30; 31 30 22; 32 31 24; 33 23 31;
34 32 55; 35 32 24; 36 24 25; 37 26 56; 38 27 28; 39 15 33; 40 16 34; 41 17 35;
42 18 36; 43 19 37; 44 21 39; 45 22 40; 46 23 41; 47 24 42; 48 25 43; 49 26 44;
50 27 45; 51 28 46; 52 33 36; 53 36 39; 54 39 41; 55 41 49; 56 34 47; 57 42 45;
58 35 37; 59 37 40; 60 40 43; 61 43 46; 62 33 34; 63 34 35; 64 47 48; 65 36 47;
66 47 37; 67 39 48; 68 48 40; 69 49 44; 70 49 42; 71 42 43; 72 44 45; 73 45 46;
74 48 42; 75 50 51; 76 51 52; 77 52 53; 78 53 54; 79 55 26; 80 50 15; 81 51 18;
82 52 21; 83 53 23; 84 54 55; 85 56 27; 86 59 57; 87 57 58; 88 56 59; 89 27 57;
90 28 58; 91 60 61; 92 61 62; 93 62 63; 94 64 65; 95 63 66; 96 66 64; 97 60 33;
98 61 36; 99 62 39; 100 63 41; 101 45 64; 102 46 65;
START GROUP DEFINITION
FLOOR
_FLR 14 TO 16 18 TO 38 79 85
_SDL 14 TO 16 18 TO 38 79 85
_RD 52 TO 74
_RDSDL 52 TO 74
_ONEFLR 17 32 33 35
_ONESDL 17 32 33 35
_ROOM 14 15 18 TO 21 23 TO 26 28 TO 31 34 TO 38 79 85
_BALCON 16 27 30 33
_AS_ST 22 27 31 32 36
_ONEROOM 17 32 33 35
_STRD 54 55 60 67 68 70 71 74
_BALCONRD 52 53 56 58 59 61 TO 73
MEMBER
_CHB 14 TO 17 20 TO 25 34 37 38 54 55 60 67 68 70 71 79 85
_CHBINT 28 TO 31 33 35 36
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
ISOTROPIC 20.7MPA
E 2.1384e+007
POISSON 0.17
DENSITY 24
ALPHA 1e-005
DAMP 0.05
G 9.28139e+006
TYPE CONCRETE
STRENGTH FCU 20700
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
1 TO 13 39 TO 51 PRIS YD 0.3 ZD 0.3
14 TO 38 52 TO 74 79 85 PRIS YD 0.35 ZD 0.2
MEMBER PROPERTY AMERICAN
75 TO 78 80 TO 84 86 TO 102 PRIS YD 0.3 ZD 0.2
CONSTANTS
MATERIAL 20.7MPA ALL
MEMBER RELEASE
35 70 75 81 TO 83 86 88 96 TO 100 START MZ
33 78 84 87 89 94 101 END MZ
MEMBER CRACKED
1 TO 13 39 TO 51 REDUCTION RIY 0.700000 RIZ 0.700000
14 TO 38 52 TO 102 REDUCTION RIY 0.350000 RIZ 0.350000
FLOOR DIAPHRAGM
DIA 1 TYPE RIG HEI 3.1 JOINT 15 TO 32 50 TO 59
DIA 2 TYPE RIG HEI 6.1 JOINT 33 TO 49 60 TO 66
SUPPORTS
1 TO 14 FIXED
DEFINE REFERENCE LOADS
LOAD R1 LOADTYPE Mass TITLE DL
SELFWEIGHT Y 1 LIST ALL
FLOOR LOAD
_FLR FLOAD 2.4 GY
_SDL FLOAD 5 GY
_RD FLOAD 2.4 GY
_RDSDL FLOAD 5 GY
ONEWAY LOAD
_ONEFLR ONE 2.4 GY
_ONESDL ONE 5 GY
MEMBER LOAD
14 TO 17 20 TO 25 34 37 38 54 55 60 67 68 70 71 79 85 UNI GY 10
28 TO 31 33 35 36 UNI GY 9.6
END DEFINE REFERENCE LOADS
DEFINE UBC LOAD
ZONE 0.4 I 1.5 RWX 8.5 RWZ 8.5 STYP 4 CT 0.0731 PX 0.284 PZ 0.284 NA 1 NV 1
LOAD 1 LOADTYPE Seismic TITLE EQ +X +E
UBC LOAD X 1 DEC 1 ACC 0.05
LOAD 2 LOADTYPE Seismic TITLE EQ +X -E
UBC LOAD X 1 DEC 1 ACC -0.05
LOAD 3 LOADTYPE Seismic TITLE EQ -X +E
UBC LOAD X -1 DEC 1 ACC 0.05
LOAD 4 LOADTYPE Seismic TITLE EQ -X -E
UBC LOAD X -1 DEC 1 ACC -0.05
LOAD 5 LOADTYPE Seismic TITLE EQ +Z +E
UBC LOAD Z 1 DEC 1 ACC 0.05
LOAD 6 LOADTYPE Seismic TITLE EQ +Z -E
UBC LOAD Z 1 DEC 1 ACC -0.05
LOAD 7 LOADTYPE Seismic TITLE EQ -Z +E
UBC LOAD Z -1 DEC 1 ACC 0.05
LOAD 8 LOADTYPE Seismic TITLE EQ -Z -E
UBC LOAD Z -1 DEC 1 ACC -0.05
LOAD 9 LOADTYPE Dead TITLE DL
REFERENCE LOAD
R1 -1.0
LOAD 10 LOADTYPE Live TITLE LL
FLOOR LOAD
_ROOM FLOAD -2.4 GY
ONEWAY LOAD
_ONEROOM ONE -2.4 GY
FLOOR LOAD
_BALCON FLOAD -2.9 GY
_AS_ST FLOAD -4.8 GY
LOAD 11 LOADTYPE Roof Live TITLE LLR
FLOOR LOAD
_STRD FLOAD -4.8 GY
_BALCONRD FLOAD -2.9 GY
PERFORM ANALYSIS
FINISH