I have a app that has been working fine for over a month, and now all
of a sudden I get this. If you know please let me know.
TypeError: Error #1009: Cannot access a property or method of a null
object reference.
at
mx.controls::AdvancedDataGridBaseEx/http://www.adobe.com/2006/flex/mx/
internal::getHeaderInfo()[C:\work\flex\dmv_automation\projects\datavis
ualisation\src\mx\controls\AdvancedDataGridBaseEx.as:2366]
at
mx.controls::AdvancedDataGrid/http://www.adobe.com/2006/flex/mx/intern
al::getHeaderInfo()[C:\work\flex\dmv_automation\projects\datavisualisa
tion\src\mx\controls\AdvancedDataGrid.as:2147]
at
mx.controls::AdvancedDataGrid/getFieldSortInfo()[C:\work\flex\dmv_auto
mation\projects\datavisualisation\src\mx\controls\AdvancedDataGrid.as:
6840]
at
mx.controls.advancedDataGridClasses::AdvancedDataGridHeaderRenderer/ge
tFieldSortInfo()[C:\work\flex\dmv_automation\projects\datavisualisatio
n\src\mx\controls\advancedDataGridClasses\AdvancedDataGridHeaderRender
er.as:757]
at
mx.controls.advancedDataGridClasses::AdvancedDataGridHeaderRenderer/me
asure()[C:\work\flex\dmv_automation\projects\datavisualisation\src\mx\
controls\advancedDataGridClasses\AdvancedDataGridHeaderRenderer.as:481
]
at
mx.core::UIComponent/measureSizes()[C:\autobuild\3.2.0\frameworks\proj
ects\framework\src\mx\core\UIComponent.as:5956]
at
mx.core::UIComponent/validateSize()[C:\autobuild\3.2.0\frameworks\proj
ects\framework\src\mx\core\UIComponent.as:5902]
at
mx.managers::LayoutManager/validateSize()[C:\autobuild\3.2.0\framework
s\projects\framework\src\mx\managers\LayoutManager.as:579]
at
mx.managers::LayoutManager/doPhasedInstantiation()[C:\autobuild\3.2.0\
frameworks\projects\framework\src\mx\managers\LayoutManager.as:692]
at Function/http://adobe.com/AS3/2006/builtin::apply()
at
mx.core::UIComponent/callLaterDispatcher2()[C:\autobuild\3.2.0\framewo
rks\projects\framework\src\mx\core\UIComponent.as:8628]
at
mx.core::UIComponent/callLaterDispatcher()[C:\autobuild\3.2.0\framewor
ks\projects\framework\src\mx\core\UIComponent.as:8568]
