# Flex Library Project - Compiler setting "-target-player=10" giving error

**URL:** <https://forum.kirupa.com/t/flex-library-project-compiler-setting-target-player-10-giving-error/294996>\
**Category:** flash\
**Created:** [August 24, 2009, 6:35am UTC](https://forum.kirupa.com/t/flex-library-project-compiler-setting-target-player-10-giving-error/294996 "2009-08-24T06:35:02Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![asscripter](https://avatars.discourse-cdn.com/v4/letter/a/a9a28c/32.png) [@asscripter](https://forum.kirupa.com/u/asscripter)\
**Post date:** [August 24, 2009, 6:35am UTC](https://forum.kirupa.com/t/flex-library-project-compiler-setting-target-player-10-giving-error/294996/1 "2009-08-24T06:35:02Z")

</div>

Hi,

I have a Flex Library Project, which uses Vector class (instead of Array). So I am wanted to use minimum Flash Player as 10. But when I set the same in “Additional Compiler Arguments” as “-target-player=10” I get the following compile time error:

[COLOR=Red]“configuration variable ‘target-player’ must only be set once”[/COLOR]

Can anyone tell me how to avoid that?

Here is the steps I am following

Goto Project -\> Rt. Click -\> Properties -\> Flex Library Compiler  
There under “Additional Compiler Arguments” set the param as “-target-player=10” (without quotes).