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https://issues.apache.org/jira/browse/FLEX-21512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Mclean resolved FLEX-21512.
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Resolution: Duplicate
> Exception when tabbing
> ----------------------
>
> Key: FLEX-21512
> URL: https://issues.apache.org/jira/browse/FLEX-21512
> Project: Apache Flex
> Issue Type: Bug
> Components: .Unspecified - Framework
> Affects Versions: Adobe Flex SDK Previous
> Environment: Affected OS(s): Windows
> Affected OS(s): Windows XP
> Language Found: English
> Reporter: Adobe JIRA
>
> Hi, running into an issue where I get the following exception when trying to
> tab between two fields, I'm only using two states. Let me know if you need me
> to post the source code or anything:
> TypeError: Error #1009: Cannot access a property or method of a null object
> reference.
> at mx.core::Window/get
> visible()[E:\dev\3.0.x\frameworks\projects\airframework\src\
> mx\core\Window.as:898]
> at
> mx.managers::FocusManager/isEnabledAndVisible()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\
> managers\FocusManager.as:610]
> at
> mx.managers::FocusManager/isValidFocusCandidate()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\
> managers\FocusManager.as:845]
> at
> mx.managers::FocusManager/getIndexOfNextObject()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\
> managers\FocusManager.as:911]
> at
> mx.managers::FocusManager/getNextFocusManagerComponent()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\
> managers\FocusManager.as:1008]
> at
> mx.managers::FocusManager/setFocusToNextObject()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\
> managers\FocusManager.as:954]
> at
> mx.managers::FocusManager/keyFocusChangeHandler()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\
> managers\FocusManager.as:1266]
> Flex Version : Flex Builder 3/sdks/3.0.0
> Flex Player version : 9.0.115
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