# Regular expression not support

**URL:** <https://forum.xbench.net/t/regular-expression-not-support/1222>\
**Category:** Technical Support\
**Created:** [October 23, 2024, 6:04am UTC](https://forum.xbench.net/t/regular-expression-not-support/1222 "2024-10-23T06:04:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Aaron](https://avatars.discourse-cdn.com/v4/letter/a/e19adc/32.png) [@Aaron](https://forum.xbench.net/u/Aaron)\
**Post date:** [October 23, 2024, 6:04am UTC](https://forum.xbench.net/t/regular-expression-not-support/1222/1 "2024-10-23T06:04:53Z")

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Hi Team,

The reg provided by the tech team %\d+$s|${{(\w+)}}|${\w+} to match  
%2$s  
${1}  
${2}  
${airportName}  
${cityNameName}  
${{1}}  
${{2}}  
${{3}}  
Which was not working for Xbench checklist, the error says “Incomplete expression”  
What’s the correct expression is to support Xbench checklist?

Thanks  
Aaron

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<div class="post-metadata">

**Author:** ![pcondal](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.xbench.net/pcondal/32/305_2.png) [@pcondal](https://forum.xbench.net/u/pcondal)\
**Post date:** [November 4, 2024, 10:55pm UTC](https://forum.xbench.net/t/regular-expression-not-support/1222/2 "2024-11-04T22:55:47Z")

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Xbench uses a different Regex flavor (POSIX), which is documented [here](https://docs.xbench.net/user-guide/regular-expressions/). You can probably replace `\d` with the [special set](https://docs.xbench.net/user-guide/special-sets/) `[:digit:]` and `\w+` with `[:alpha:]`.