CALLTHIS is looped

[Nikolay Klinachyov]

in Shape
2 subShape

in 1st subShape
CALLTHIS("SimLib.sum_PropChanged";;Sheet.202!Prop.Row_1)
+DEPENDSON(Sheet.202!Prop.Row_1)

in 2nd subShape
CALLTHIS("SimLib.sum_PropChanged";;Sheet.202!Prop.Row_2)
+DEPENDSON(Sheet.202!Prop.Row_2)

where Sheet.202 is parent Shape

in VB

Sub sum_PropChanged(ByVal Shape As Visio.IVShape, pv As Double)
MsgBox pv
' If pv > 0 Then
' Shape.Text = "+"
' Else: Shape.Text = "-"
' End If
End Sub


Why this construction is looped?