problem about pspice simulation

Hello !

 I am a learner about pspice,when I simulate my circuit, I find there is a problem that I cann't solve by myself.

 The circuit that I draw is a Analog multiplication circuit, when I run it, the  last of the out file is an errror as below:

ERROR -- Circuit Too Large!
EVALUATION VERSION Limit Exceeded for "Q" Devices!

Anyone who can help me ,I  will be very appreciated.

Thank you!

I put the out file here:

**** 12/02/09 21:23:27 *********** Evaluation PSpice (Nov 1999) **************

 ** Profile: "SCHEMATIC1-2sincos"  [ c:\program files\orcad_demo\1-schematic1-2sincos.sim ]

 ****     CIRCUIT DESCRIPTION

******************************************************************************

** Creating circuit file "1-schematic1-2sincos.sim.cir"
** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS

*Libraries:
* Local Libraries :
* From [PSPICE NETLIST] section of pspiceev.ini file:
.lib "nom.lib"

*Analysis directives:
.TRAN  0 1000ns 0
.PROBE
.INC "1-SCHEMATIC1.net"

**** INCLUDING 1-SCHEMATIC1.net ****
* source 1
R_R14         6 5  8.2k 
Q_Q2         N00137 8 N00154 Q2N2222
R_R15         11 10  8.2k 
R_R16         0 3  13k 
R_R17         0 13  13k 
D_D1         1 N00117 MBD101
D_D2         1 N00137 MBD101
R_R5         7 N00748  500 
Q_Q11         N00810 9 N00936 Q2N2222
Q_Q3         N00117 N00148 5 Q2N2222
R_R7         7 N01034  500 
R_R8         7 N01037  500 
V_V3         N02794 0 15Vdc
Q_Q13         N00820 N00969 11 Q2N2222
V_V4         0 7 -15Vdc
Q_Q1         N00117 4 N00148 Q2N2222
Q_Q12         N00810 N00936 10 Q2N2222
Q_Q14         N00820 12 N00969 Q2N2222
Q_Q4         N00137 N00154 6 Q2N2222
D_D3         3 N00748 MBD101
R_R6         7 N01098  500 
Q_Q15         10 13 N01034 Q2N2222
R_R11         1 N02794  3.3k 
R_R12         2 N02794  3.3k 
R_R13         14 N02794  3.3k 
Q_Q7         2 N00137 N00810 Q2N2222
R_R2         6 N00154  4k 
R_R1         5 N00148  4k 
R_R3         7 N00283  500 
R_R9         10 N00936  4k 
R_R10         11 N00969  4k 
R_R4         7 N00286  500 
Q_Q16         11 13 N01037 Q2N2222
Q_Q8         14 N00117 N00810 Q2N2222
Q_Q9         2 N00117 N00820 Q2N2222
Q_Q5         5 3 N00283 Q2N2222
Q_Q10         14 N00137 N00820 Q2N2222
Q_Q6         6 3 N00286 Q2N2222
V_V1         4 8 
+SIN 0 1 50 0 0 0
V_V2         9 12 
+SIN 0 1 50 0 0 0
D_D4         13 N01098 MBD101

**** RESUMING 1-schematic1-2sincos.sim.cir ****
.INC "1-SCHEMATIC1.als"

**** INCLUDING 1-SCHEMATIC1.als ****
.ALIASES
R_R14           R14(1=6 2=5 )
Q_Q2            Q2(c=N00137 b=8 e=N00154 )
R_R15           R15(1=11 2=10 )
R_R16           R16(1=0 2=3 )
R_R17           R17(1=0 2=13 )
D_D1            D1(1=1 2=N00117 )
D_D2            D2(1=1 2=N00137 )
R_R5            R5(1=7 2=N00748 )
Q_Q11           Q11(c=N00810 b=9 e=N00936 )
Q_Q3            Q3(c=N00117 b=N00148 e=5 )
R_R7            R7(1=7 2=N01034 )
R_R8            R8(1=7 2=N01037 )
V_V3            V3(+=N02794 -=0 )
Q_Q13           Q13(c=N00820 b=N00969 e=11 )
V_V4            V4(+=0 -=7 )
Q_Q1            Q1(c=N00117 b=4 e=N00148 )
Q_Q12           Q12(c=N00810 b=N00936 e=10 )
Q_Q14           Q14(c=N00820 b=12 e=N00969 )
Q_Q4            Q4(c=N00137 b=N00154 e=6 )
D_D3            D3(1=3 2=N00748 )
R_R6            R6(1=7 2=N01098 )
Q_Q15           Q15(c=10 b=13 e=N01034 )
R_R11           R11(1=1 2=N02794 )
R_R12           R12(1=2 2=N02794 )
R_R13           R13(1=14 2=N02794 )
Q_Q7            Q7(c=2 b=N00137 e=N00810 )
R_R2            R2(1=6 2=N00154 )
R_R1            R1(1=5 2=N00148 )
R_R3            R3(1=7 2=N00283 )
R_R9            R9(1=10 2=N00936 )
R_R10           R10(1=11 2=N00969 )
R_R4            R4(1=7 2=N00286 )
Q_Q16           Q16(c=11 b=13 e=N01037 )
Q_Q8            Q8(c=14 b=N00117 e=N00810 )
Q_Q9            Q9(c=2 b=N00117 e=N00820 )
Q_Q5            Q5(c=5 b=3 e=N00283 )
Q_Q10           Q10(c=14 b=N00137 e=N00820 )
Q_Q6            Q6(c=6 b=3 e=N00286 )
V_V1            V1(+=4 -=8 )
V_V2            V2(+=9 -=12 )
D_D4            D4(1=13 2=N01098 )
_    _(7=7)
_    _(1=1)
_    _(2=2)
_    _(9=9)
_    _(4=4)
_    _(10=10)
_    _(5=5)
_    _(14=14)
_    _(8=8)
_    _(6=6)
_    _(13=13)
_    _(11=11)
_    _(12=12)
_    _(3=3)
.ENDALIASES

**** RESUMING 1-schematic1-2sincos.sim.cir ****
.END

ERROR -- Circuit Too Large!
EVALUATION VERSION Limit Exceeded for "Q" Devices!