『求助』SORRY, NEGATIVE JACOBIAN DETECTED AT

我用Deform 2D 计算轴对称镦粗，出现以下错误信息，191步停止，设定200步，
Step number is -191
STEP NUMBER = 191
PROFILE REDUCTION!
ORIGINAL COLUMN HEIGHT (SUM) = 102664
RENUMBERED COLUMN HEIGHT (SUM) = 101555
DIRECT METHOD
ITERATION VELOCITY RELATIVE VELOCITY RELATIVE FORCE
NUMBER NORM ERROR NORM ERROR NORM

SORRY, NEGATIVE JACOBIAN DETECTED AT ELEMENT NO. 36 OF OBJECT 1
DXJ,S,T = 0.1044093 -0.5773503 -0.5773503
请教解决方法。