# Enable source code comparison

**URL:** <https://community.br-automation.com/t/enable-source-code-comparison/5289>\
**Category:** B&R Software & Runtime\
**Tags:** automation-studio\
**Created:** [December 22, 2024, 6:24pm UTC](https://community.br-automation.com/t/enable-source-code-comparison/5289 "2024-12-22T18:24:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![electrofasa21](https://avatars.discourse-cdn.com/v4/letter/e/FF8800/32.png) [@electrofasa21](https://community.br-automation.com/u/electrofasa21)\
**Post date:** [December 22, 2024, 6:24pm UTC](https://community.br-automation.com/t/enable-source-code-comparison/5289/1 "2024-12-22T18:24:33Z")

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Hello,

Why doesn’t my new basic project let me enable the source code comparison box in physical configuration/properties/comparison?

I can’t enable this box, I send image.

Any help always grateful.

 ![Captura de pantalla 2024-12-22 191745](https://europe1.discourse-cdn.com/brcommunity/original/2X/0/05bbb02f37d63fc084a72104bf3285396d42c6d0.png)

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**Author:** ![alexander.hefner](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/alexander.hefner/32/111_2.png) [@alexander.hefner](https://community.br-automation.com/u/alexander.hefner)\
**Post date:** [December 22, 2024, 6:48pm UTC](https://community.br-automation.com/t/enable-source-code-comparison/5289/2 "2024-12-22T18:48:10Z")

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Hi,

version of Automation Runtime has to be \>= 4.41 for supporting [source comparison](https://help.br-automation.com/#/en/4/projectmanagement/projectcompare/targetcompare/projectcompare_targetcompare.html).

It looks like you’re using a X20CP1484, unfortunately this plc is not supported by AR4.x because it’s a legacy product.

Best regards!