simulation error in orcad...pspice experts plz help

i am trying to generate gate pulse using SG3526.
i am getting following error.What should i do????
plz help me.


** Profile: "SCHEMATIC1-456" [ E:\Schematic\3526-5\3256-5-PSpiceFiles\SCHEMATIC1\456.sim ]


**** CIRCUIT DESCRIPTION


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




** Creating circuit file "456.cir"
** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS

*Libraries:
* Profile Libraries :
* Local Libraries :
* From [PSPICE NETLIST] section of C:\Program Files\OrCAD\tools\PSpice\PSpice.ini file:
.lib "nom.lib"

*Analysis directives:
.TRAN 0 1000ns 0 12.5n SKIPBP
.OPTIONS ITL1= 1000
.OPTIONS ITL2= 1000
.OPTIONS ITL4= 1000
.PROBE V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*))
.INC "..\SCHEMATIC1.net"



**** INCLUDING SCHEMATIC1.net ****
* source 3256-5
R_R11 0 N001166 10_15k
V_V3 N09645 0 12Vdc
C_C4 N09736 0 .1u
R_R16 N09736 N09645 100
R_R7 N02391 0 1
R_R15 N08325 0 9k
V_V4 N00743 0 10Vdc
R_R3 N01390 N01482 100
R_R12 N01264 0 10_15k
R_R8 N02520 0 10_15
V_V5 N00762 0 5Vdc
X_U1 N01153 N00867 N00795 N02276 N02391 0 N01086 N01390 N05357 N01482
+ N00743 N01264 N00824 N001166 N00912 N02520 N09736 N00762 awbsg3526 PARAMS:
+ PERIOD=20e-6 DEAD_TIME=1e-6 MIN_V=0 MAX_V=5
V_V2 N08412 0 5Vdc
R_R9 0 N05357 8k
V_V1 N001500 0 5Vdc
R_R13 N01482 N08325 1k
R_R4 0 N00824 2k
C_C1 N01153 N01086 470pF
R_R10 N05357 N001500 100
C_C3 0 N00867 1n
R_R1 N01153 N01086 10k
R_R14 N08412 N08325 1k
R_R5 0 N00795 100
R_R6 N02276 0 1
C_C2 0 N00912 22u

**** RESUMING 456.cir ****
.END

ERROR -- Convergence problem in transient analysis at Time = 10.02E-09
Time step = 236.2E-21, minimum allowable step size = 1.000E-18

These supply currents failed to converge:

I(X_U1.xinstsg3526.VV122) = 0A \ -14.90nA

These devices failed to converge:
X_U1.xinstsg3526.QQ13



Last node voltages tried were:

NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE


(N00743) 10.0000 (N00762) 5.0000 (N00795) 0.0000 (N00824) 0.0000

(N00867) 3.1786 (N00912) 45.55E-09 (N01086) .2110 (N01153) .2109

(N01264) .0020 (N01390) 4.5100 (N01482) 4.5097 (N02276)-6.450E-09

(N02391)-6.450E-09 (N02520) .0020 (N05357) 4.9378 (N08325) 4.5046

(N08412) 5.0000 (N09645) 12.0000 (N09736) .0120 (N001166) .0020

(N001500) 5.0000 (X_U1.xinstsg3526.2) -.6880

(X_U1.xinstsg3526.3) 4.0000 (X_U1.xinstsg3526.10) .0010

(X_U1.xinstsg3526.14) 1.0000 (X_U1.xinstsg3526.15) .0020

(X_U1.xinstsg3526.16) 4.1437 (X_U1.xinstsg3526.17) -.9980

(X_U1.xinstsg3526.18) .0010 (X_U1.xinstsg3526.19) .0010

(X_U1.xinstsg3526.20) .3947 (X_U1.xinstsg3526.21) 999.2E-06

(X_U1.xinstsg3526.22) 4.9361 (X_U1.xinstsg3526.23) 1.0000

(X_U1.xinstsg3526.25) 9.5483 (X_U1.xinstsg3526.26) 394.7E-06

(X_U1.xinstsg3526.27) .0646 (X_U1.xinstsg3526.28) .5010

(X_U1.xinstsg3526.30) 9.5484 (X_U1.xinstsg3526.31) .0646

(X_U1.xinstsg3526.32) 5.0000 (X_U1.xinstsg3526.33) 4.7252

(X_U1.xinstsg3526.34) 4.7252 (X_U1.xinstsg3526.35) 3.6000

(X_U1.xinstsg3526.38) 9.5484 (X_U1.xinstsg3526.42) 9.9740

(X_U1.xinstsg3526.43) .6800 (X_U1.xinstsg3526.45) 1.5010

(X_U1.xinstsg3526.46) .0505 (X_U1.xinstsg3526.49) .2058

(X_U1.xinstsg3526.51) 4.5099 (X_U1.xinstsg3526.54) .0010

(X_U1.xinstsg3526.57) -.1500 (X_U1.xinstsg3526.59) .0500

(X_U1.xinstsg3526.600) 4.9999


**** Interrupt ****

It is difficult to say. The problem appears to be related to QQ13 in the awbsg3526 model, but as I don't have that model it is tricky to say.

The usual cause of convergence problems is floating nodes so I would check that all nodes in your circuit have a DC path to ground. The other possibility is an unstable model which could be caused by the parameters you are passing to the awbsg3526 model so double check those carefully.

Keith.