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https://issues.apache.org/jira/browse/FLEX-34118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13933070#comment-13933070
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Maurice Amsellem commented on FLEX-34118:
-----------------------------------------

_horizontalAxisRenderers and _verticalAxisRenderers are accessed in many places 
in the class where it assumes it is not null.

Also, both are initialized are empty arrays:
{code}

   line 567:  private var _horizontalAxisRenderers:Array /* of AxisRenderer */ 
= [];
  line 739:  private var _verticalAxisRenderers:Array /* of AxisRenderer */ = 
[];
{code}

they can't have been set to null values, becauses that would have caused RTE in 
the setters.

So IMO,  it's something else 


> CartesianChart null pointer
> ---------------------------
>
>                 Key: FLEX-34118
>                 URL: https://issues.apache.org/jira/browse/FLEX-34118
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: Charts
>    Affects Versions: Apache Flex 4.11.0
>            Reporter: Alexander Mazuruk
>
> TypeError: Error #1010: A term is undefined and has no properties.
>       at 
> mx.charts.chartClasses::CartesianChart/commitProperties()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/charts/src/mx/charts/chartClasses/CartesianChart.as:922]
>       at 
> mx.core::UIComponent/validateProperties()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/core/UIComponent.as:8482]
>       at 
> mx.managers::LayoutManager/validateProperties()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/managers/LayoutManager.as:605]
>       at 
> mx.managers::LayoutManager/doPhasedInstantiation()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/managers/LayoutManager.as:821]
>       at 
> mx.managers::LayoutManager/doPhasedInstantiationCallback()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/managers/LayoutManager.as:1188]



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