model with frictional contact showing error at 0.999 of step time of sliding step

[Saif_mithu]

Working on a model with frictional contact having sliding motion. but its showing error at 0.999 of step time of sliding step. how to solve this?

Using surface to surface discretization, finite sliding, penalty formulation. but my model is showing error at 0.999 of step time of sliding step.
I want to see the effect of changing friction coefficient in von mises stress while sliding of a rigid roller on a Elastic substrate.

Here is part of my input file. Hope you can help me better.

** MATERIALS
**
*Material, name=Coat-1
*Elastic
420000., 0.3
*Material, name=Substrate
*Elastic
210000., 0.3
**
** INTERACTION PROPERTIES
**
*Surface Interaction, name=IntProp-1
1.,
*Friction
0.,
*Surface Behavior, pressure-overclosure=HARD
*Surface Interaction, name=IntProp-2
1.,
*Friction, slip tolerance=0.005
0.5,
*Surface Behavior, penalty=NONLINEAR
*Surface Interaction, name=_Int-1-Prop
1.,
*Friction, slip tolerance=0.005
0.5,
*Surface Behavior, penalty=NONLINEAR
**
** BOUNDARY CONDITIONS
**
** Name: BC-1 Type: Displacement/Rotation
*Boundary
Part-1-1.BotEdge-1, 1, 1
Part-1-1.BotEdge-1, 2, 2
Part-1-1.BotEdge-1, 6, 6
** Name: BC-2 Type: Displacement/Rotation
*Boundary
Set-4, 1, 1
Set-4, 6, 6
**
** INTERACTIONS
**
** Interaction: Int-1
*Contact Pair, interaction=_Int-1-Prop, type=SURFACE TO SURFACE
Part-1-1.CotSurf-1, Part-2-1.RigSurf-1
** ----------------------------------------------------------------
**
** STEP: Step-1
**
*Step, name=Step-1, nlgeom=YES, inc=1000
*Static
1., 1., 1e-05, 1.
**
**
** LOADS
**
** Name: Load-1 Type: Concentrated force
*Cload
Set-4, 2, -20.
**
** OUTPUT REQUESTS
**
*Restart, write, frequency=0
**
** FIELD OUTPUT: F-Output-1
**
*Output, field
*Node Output
CF, RF, U
*Element Output, directions=YES
FV, MISESMAX, S
*Contact Output
CDISP, CSTRESS
**
** HISTORY OUTPUT: H-Output-1
**
*Output, history, variable=PRESELECT
*End Step
** ----------------------------------------------------------------
**
** STEP: Step-2
**
*Step, name=Step-2, nlgeom=YES, inc=1000, UNSYMM=YES
*Static
0.01, 2., 1e-08, 1.
**
** BOUNDARY CONDITIONS
**
** Name: BC-1 Type: Displacement/Rotation
*Boundary, op=NEW
Part-1-1.BotEdge-1, 1, 1
Part-1-1.BotEdge-1, 2, 2
Part-1-1.BotEdge-1, 6, 6
** Name: BC-2 Type: Displacement/Rotation
*Boundary, op=NEW
Set-4, 6, 6
**
** LOADS
**
** Name: Load-1 Type: Concentrated force
*Cload
Set-4, 1, 10.
**
** INTERACTIONS
**
** Interaction: Int-1
*Change Friction, interaction=_Int-1-Prop
*Friction, slip tolerance=0.005
0.5,
**
** CONTROLS
**
*Controls, reset
*Controls, analysis=discontinuous
**
** OUTPUT REQUESTS
**
*Restart, write, frequency=0
**
** FIELD OUTPUT: F-Output-1
**
*Output, field
*Node Output
CF, RF, U
*Element Output, directions=YES
MISESMAX, S
*Contact Output
CDISP, CSTRESS
**
** HISTORY OUTPUT: H-Output-1
**
*Output, history, variable=PRESELECT
*End Step