请教高手计算时出现这个错误是怎么回事？

请教高手计算时出现这个错误是怎么回事？下面是计算时出现的命令流。
/SOLVE
EQSLV,SPARSE
! USING SPARSE MATRIX SOLVER
ANTYPE,HARMIC ! PERFORM HARMONIC ANALYSIS
OUTRES,ALL,ALL
HARFRQ,1000,20000
NSUBST,50
KBC,1
DMPRAT,0.02
ALLSEL,ALL
solve
FINISH
/POST26
RFORCE,2,N1,AMPS,, AMPS1
RFORCE,3,N2,AMPS,, AMPS2
RFORCE,4,N3,AMPS,, AMPS3
RFORCE,5,N4,AMPS,, AMPS4
RFORCE,6,N5,AMPS,, AMPS5
*SET,PI2,(3.14159*2.)
ADD,7,2,3,,asd,
ADD,8,7,4,,asdf,
ADD,9,8,5,,asdff,
ADD,10,9,6,,asdfff,
PROD,11,10,1,,MHOS,,,PI2
FINISH