# CRON expression is invalid Using Hangfire 1.7.6, CronEspresso 3.0.0

**URL:** <https://discuss.hangfire.io/t/cron-expression-is-invalid-using-hangfire-1-7-6-cronespresso-3-0-0/6593>\
**Category:** question\
**Created:** [September 23, 2019, 7:06am UTC](https://discuss.hangfire.io/t/cron-expression-is-invalid-using-hangfire-1-7-6-cronespresso-3-0-0/6593 "2019-09-23T07:06:44Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Damodar\_K](https://dub1.discourse-cdn.com/flex017/user_avatar/discuss.hangfire.io/damodar_k/32/1544_2.png) [@Damodar\_K](https://discuss.hangfire.io/u/Damodar_K)\
**Post date:** [September 23, 2019, 7:06am UTC](https://discuss.hangfire.io/t/cron-expression-is-invalid-using-hangfire-1-7-6-cronespresso-3-0-0/6593/1 "2019-09-23T07:06:44Z")

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Hi,

I am getting CRON expression is invalid for 0 0/2 \* 1/1 \* ? \*

When I tested it in [https://www.freeformatter.com/cron-expression-generator-quartz.html](https://www.freeformatter.com/cron-expression-generator-quartz.html)  
It was able to convert it correctly.

Best Regards,  
Damodar

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**Author:** ![Hans\_Engelen](https://dub1.discourse-cdn.com/flex017/user_avatar/discuss.hangfire.io/hans_engelen/32/1513_2.png) [@Hans\_Engelen](https://discuss.hangfire.io/u/Hans_Engelen)\
**Post date:** [September 23, 2019, 8:44pm UTC](https://discuss.hangfire.io/t/cron-expression-is-invalid-using-hangfire-1-7-6-cronespresso-3-0-0/6593/2 "2019-09-23T20:44:59Z")

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Last I checked Hangfire only supports cron expressions of 5 ‘fields’. Mind you I did notice the validation rules did get a lot stricter in recent releases. For instance some funny person recently added some jobs on one of my hangfire backed apps with 10/60 \* \* \* \* … Which makes utterly no sense really but worked fine on older versions.

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**Author:** ![Damodar\_K](https://dub1.discourse-cdn.com/flex017/user_avatar/discuss.hangfire.io/damodar_k/32/1544_2.png) [@Damodar\_K](https://discuss.hangfire.io/u/Damodar_K)\
**Post date:** [September 23, 2019, 10:37pm UTC](https://discuss.hangfire.io/t/cron-expression-is-invalid-using-hangfire-1-7-6-cronespresso-3-0-0/6593/3 "2019-09-23T22:37:15Z")

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Hi Hans\_Engelen,

Thanks, any update / insight from the Hangfire team?

Best Regards,  
Damodar

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**Author:** ![bigB](https://avatars.discourse-cdn.com/v4/letter/b/71c47a/32.png) [@bigB](https://discuss.hangfire.io/u/bigB)\
**Post date:** [September 27, 2019, 3:01pm UTC](https://discuss.hangfire.io/t/cron-expression-is-invalid-using-hangfire-1-7-6-cronespresso-3-0-0/6593/4 "2019-09-27T15:01:22Z")

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[https://github.com/HangfireIO/Hangfire/blob/master/src/Hangfire.Core/Cron.cs](https://github.com/HangfireIO/Hangfire/blob/master/src/Hangfire.Core/Cron.cs) as @Hans_Engelen said.

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**Author:** ![Damodar\_K](https://dub1.discourse-cdn.com/flex017/user_avatar/discuss.hangfire.io/damodar_k/32/1544_2.png) [@Damodar\_K](https://discuss.hangfire.io/u/Damodar_K)\
**Post date:** [January 9, 2020, 9:47pm UTC](https://discuss.hangfire.io/t/cron-expression-is-invalid-using-hangfire-1-7-6-cronespresso-3-0-0/6593/5 "2020-01-09T21:47:06Z")

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Hi,

Any updates on this? Or any solution for accepting standard CRON expression?

Best Regards,  
Damodar