# \[AS3 / DataGrid / CellRenderer / PHP\] Parameter Child must be non-null

**URL:** <https://forum.kirupa.com/t/as3-datagrid-cellrenderer-php-parameter-child-must-be-non-null/330917>\
**Category:** flash\
**Created:** [April 7, 2013, 9:37pm UTC](https://forum.kirupa.com/t/as3-datagrid-cellrenderer-php-parameter-child-must-be-non-null/330917 "2013-04-07T21:37:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lautaro](https://avatars.discourse-cdn.com/v4/letter/l/4da419/32.png) [@lautaro](https://forum.kirupa.com/u/lautaro)\
**Post date:** [April 7, 2013, 9:37pm UTC](https://forum.kirupa.com/t/as3-datagrid-cellrenderer-php-parameter-child-must-be-non-null/330917/1 "2013-04-07T21:37:52Z")

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I’m currently developing an application using Flash AS3 CS5 embedded in a PHP script and I’m having issues with DataGrid custom CellRenderer.  
This part of the application has to display some information retreived from a MySql Database. Using the default DataGrid all information is properly placed in its rows/columns.  
When I try to align some column fields (right, for instance) I receive an error message saying “Parameter Child must be non-null”. Well, this is driving me crazy because if I replace the data retrieved from the Database by a hardcoded array in the .fla so I can run it in my Flash StandAlone, it runs ok.  
Furthermore, when I test it online **using the same hardcoded data** from the .swf embedded in the PHP script, i receive the mentioned error about Parameter Child.  
The application (embedded in the PHP script) uses a main .swf file where many other .swf files are being loaded by User request. In some forums I have visited recommended adding a DataGrid component to the main .swf - so I dd but nothing changed.  
Does anybody can enlighten me to the solution to this issue? I really appreciate your interest and contribution.