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Error in GUI

Time:October 11
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Hi all,
          While creating GUI  i got the following error
java.lang.IllegalArgumentException: -1
     at com.sap.tc.webdynpro.clientserver.uielements.adaptbase.IndexedItemsIterator.advanceIndex(IndexedItemsIterator.java:104)
*     at com.sap.tc.webdynpro.clientserver.uielib.standard.uradapter.GridLayoutAdapter$Cells.doNext(GridLayoutAdapter.java:368)*
*     at com.sap.tc.webdynpro.clientserver.uielements.adaptbase.IndexedItemsIterator.next(IndexedItemsIterator.java:54)*
*     at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutRowFragment(GridLayoutRenderer.java:421)*
*     at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutFragment(GridLayoutRenderer.java:336)*
*     at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.render(GridLayoutRenderer.java:79)*
*     at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)*
*     at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)*
*     at com.sap.tc.ur.renderer.ie6.GroupRenderer.renderGroupFragment(GroupRenderer.java:1184)*
*     at com.sap.tc.ur.renderer.ie6.GroupRenderer.render(GroupRenderer.java:74)*
can u plz help me out
Regards
Padma N
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Hi,
There is some problem in the properties of the UI Elements set by you.
Check all the properties and give them acceptable values.