seismic definition in staad.

Just a question in using the seismic definition in staad, i created a simple structure and an error occurs when i run analysis...

i only used perform analysis not p-delta

   48. MEMBER WEIGHT

 
   *** ERROR *** ABOVE LINE CONTAINS ERRONEOUS DATA.



STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 27-Nov-12
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 5 0 0; 3 10 0 0; 4 0 0 5; 5 5 0 5; 6 10 0 5; 7 0 0 10; 8 5 0 10;
9 10 0 10; 10 0 3 0; 11 5 3 0; 12 10 3 0; 13 0 3 5; 14 5 3 5; 15 10 3 5;
16 0 3 10; 17 5 3 10; 18 10 3 10; 19 0 6 0; 20 5 6 0; 21 10 6 0; 22 0 6 5;
23 5 6 5; 24 10 6 5; 25 0 6 10; 26 5 6 10; 27 10 6 10;
MEMBER INCIDENCES
1 1 10; 2 10 19; 3 4 13; 4 13 22; 5 7 16; 6 16 25; 7 2 11; 8 11 20; 9 3 12;
10 12 21; 11 5 14; 12 14 23; 13 6 15; 14 15 24; 15 8 17; 16 17 26; 17 9 18;
18 18 27; 19 10 13; 20 10 11; 21 11 12; 22 12 15; 23 15 18; 24 13 16; 25 16 17;
26 17 18; 27 13 14; 28 14 15; 29 19 20; 30 20 21; 31 21 24; 32 24 27; 33 19 22;
34 22 25; 35 25 26; 36 26 27; 37 22 23; 38 23 24; 39 20 23; 40 23 26;
ELEMENT INCIDENCES SHELL
41 10 13 14 11; 42 11 14 15 12; 43 13 16 17 14; 44 14 17 18 15; 45 19 22 23 20;
46 20 23 24 21; 47 22 25 26 23; 48 23 26 27 24;
ELEMENT PROPERTY
41 TO 48 THICKNESS 0.1
DEFINE MATERIAL START
ISOTROPIC CONCRETE
E 2.17185e+007
POISSON 0.17
DENSITY 23.5616
ALPHA 1e-005
DAMP 0.05
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
1 TO 18 PRIS YD 0.3 ZD 0.3
19 TO 40 PRIS YD 0.4 ZD 0.2
CONSTANTS
MATERIAL CONCRETE ALL
SUPPORTS
1 TO 9 FIXED
DEFINE WIND LOAD
TYPE 1
INT 0.7 0.9 HEIG  3  6
TYPE 2
INT 1.2 1.6 HEIG  3  6
DEFINE UBC ACCIDENTAL LOAD
ZONE 0.4 I 0.85 RWX 8.5 RWZ 8.5 STYP 3 NA 1.2 NV 1.4
SELFWEIGHT 1 
FLOOR WEIGHT
YRANGE 3 6 FLOAD 2.4 XRANGE 0 10 ZRANGE 0 10
MEMBER WEIGHT
19 TO 26 29 TO 36 UNI 2.3
LOAD 1 LOADTYPE None  TITLE EX
UBC LOAD X
LOAD 2 LOADTYPE None  TITLE EZ
UBC LOAD Z
LOAD 3 LOADTYPE None  TITLE WX
WIND LOAD X 1 TYPE 1 YR 3 6 ZR 0 10
WIND LOAD -X 1 TYPE 1 YR 3 6 ZR 0 10
LOAD 4 LOADTYPE None  TITLE WZ
WIND LOAD Z 1 TYPE 1 XR 0 10 YR 3 6
WIND LOAD -Z 1 TYPE 1 XR 0 10 YR 3 6
LOAD 5 LOADTYPE None  TITLE DEAD
SELFWEIGHT Y -1 
FLOOR LOAD
YRANGE 3 6 FLOAD 2.4 XRANGE 0 10  ZRANGE 0 10  GY
MEMBER LOAD
19 TO 26 29 TO 36 UNI GY -2.3
LOAD 6 LOADTYPE None  TITLE LIVE
FLOOR LOAD
YRANGE 3 6 FLOAD -1.9 XRANGE 0 10  ZRANGE 0 10  GY
LOAD COMB 7 COMBINATION LOAD CASE 7
5 1.2 6 1.6 
LOAD COMB 8 COMBINATION LOAD CASE 8
5 1.2 3 0.8 
LOAD COMB 9 COMBINATION LOAD CASE 9
4 0.8 5 1.2 
LOAD COMB 10 COMBINATION LOAD CASE 10
5 0.9 1 1.0 
LOAD COMB 11 COMBINATION LOAD CASE 11
1 1.0 5 0.9 
PERFORM ANALYSIS
START CONCRETE DESIGN
CODE ACI
FC 27600 ALL
FYMAIN 276000 ALL
FYSEC 276000 ALL
MINMAIN 20 ALL
MINSEC 10 ALL
TRACK 0 ALL
DESIGN BEAM 23 26 32 36
DESIGN COLUMN 11 12 17 18
CONCRETE TAKE
END CONCRETE DESIGN
PRINT SUPPORT REACTION ALL
FINISH