Work with group shape & subshape in powerpoint

Sir please help

I have a group shape(also have animation) consist of a rectangle & three text box with text in it. I want to configure a code which will generate 10 groups(ie group1, group2, group3,.......group10) with same shape, size, location, animation, textbox with text same as group1. After generating I also want to replace all text in the textboxes with some other text.But I have no idea how to work with group & subshape object. For start I try to generate 10 group in below code but got error "The specified value is out of range" for this gshp.PickUpline. Any other solution will be appreciated.
Thanks in advance.

Sub addGrp()


Dim oeff As Effect

Dim t As Long

Dim l As Long

Dim h As Long

Dim w As Long

Dim j As Long

Dim gshp As Shape

Dim grpshp As Shape

Dim osld As Slide

Set osld = ActivePresentation.Slides(1)

For j = 1 To 10

Set gshp = osld.Shapes("group" & j)

If gshp Is Nothing Then GoTo err

gshp.PickupAnimation

gshp.PickUp

With gshp

t = .Top

l = .Left

h = .Height

w = .Width

End With


Set grpshp = osld.Shapes.AddShape(gshp.AutoShapeType, l, t, w, h)

grpshp.Apply

grpshp.ApplyAnimation

Set oeff = osld.TimeLine.MainSequence.FindFirstAnimationFor(grpshp)

oeff.Timing.TriggerDelayTime = (j - 4) * 4.5

oeff.Timing.TriggerType = msoAnimTriggerWithPrevious

grpshp.Name = "group" & j + 1

Next j

Exit Sub
err:
MsgBox "Error, please select a shape."


End Sub