ansys出现错误，求高手指教

*** FATAL *** CP = 307.587 TIME= 19:06:43
The supplied nonlinear material properties produced an incorrect
material tangent matrix. Please check your TB input carefully. A
very small yield stress may cause this failure.
程序如下：
!-------------------------混凝土本构关系-------------------------
!* 将立方体强度折算为棱柱体强度
ALFACCU=(1.015*FCU-12.31)/FCU !系数
FC=FCU*ALFACCU !棱柱体抗压强度，用来计算峰值应变
ALFAA=2.4-0.01*FCU !系数，E0/EP，初始弹模与峰值割线模量比值，用于上升段曲线
!ALFAD=0.132*FCU**0.785-0.905 !系数，用于下降段曲线
EPSC=(700+172*SQRT(FC))*1E-6 !峰值应变
SEUP=9 !应力应变曲线中上升段考虑的点数，可更改
SEDN=5 !应力应变曲线中下降段考虑的点数，可更改
secondpoint=0.001088*FCU+0.5112 !计算对应0.8fc时的第二个应变点
*DIM,XE,ARRAY,SEUP+SEDN
XE(1)=0,secondpoint,0.7,0.75,0.8,0.85,0.9,0.95,1
XE(10)=1.2,1.5,1.8,2,3
*DIM,SEDOT_,ARRAY,SEUP+SEDN,2
*DO,I,1,SEUP+SEDN
SEDOT_(I,1)=XE(I)*EPSC
*ENDDO
!****上升段曲线点****
*DO,I,1,SEUP
X=XE(I)
SEDOT_(I,2)=(ALFAA*X+(3-2*ALFAA)*X**2+(ALFAA-2)*X**3)*FC
*ENDDO
!****下降段曲线点****
*DO,I,SEUP+1,SEUP+SEDN
X=XE(I)
SEDOT_(I,2)=FC
*ENDDO
EC=SEDOT_(2,2)/SEDOT_(2,1)
FT=0.395*FC**0.55
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!-------------- 单元与材料-----------!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
/PREP7
ET,1,MESH200,6
ET,2,SOLID65 !定义普通单元模拟混凝土井壁
KEYOPT,2,6,3 !输出积分点结果
KEYOPT,2,7,1 !打开应力松弛
!材料属性
!定义井壁混凝土材料
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,EC
MPDATA,PRXY,1,,MUC
!MPDATA,DENS,1,,DENC !密度及重力加速度关系到井壁自重
TB,MISO,1,1,SEUP+SEDN !多线性各向同性强化，von mises屈服准则
*DO,I,1,SEUP+SEDN
TBPT,,SEDOT_(I,1),SEDOT_(I,2)
*ENDDO
TB,CONC,1,1,9, !破坏准则，W-W
TBDATA,,0.5,0.95,FT,FC,, !关键
TBDATA,,,,1,,,
!定义钢筋材料
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,2,,TMGJ
MPDATA,PRXY,2,,MUGJ
TB,BKIN,2,1,2,1
TBDATA,,QSGJ,,,,
!TBPLOT,BKIN,2
!定义配筋实常数
JXPJL=0.001
HXPJL=0.03
ZXPJL=0.03
R,1,2,JXPJL,,,2,HXPJL,
RMORE,90,,2,ZXPJL,90,90,
FINI
急求答案，谢谢！急啊