Why is my CRON expression not accepted?

I am trying to set up a rule that will create an issue every weekday at noon UTC. The below CRON expression is what I am trying to use:

0 0 12 ? * 2-6 *

However, when I try to publish the rule I get the below error:

Value -1 for dayOfMonth must be in the range [1,31]

The value I have set for dayOfMonth is '?' so that I can set the dayOfWeek to include only weekdays. How do I get my desired result?

1 answer

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Accepted answer
Andreas Knecht Community Champion Jan 27, 2017

Hi Jamie,

Sorry about this, but seems like you've run into a bug with the validation our cron library performs: https://codebarrel.atlassian.net/browse/AUT-130

For now can you try changing your CRON expression to: 

0 0 12 ? * 2,3,4,5,6 *

Hope that helps!


Hi Andreas,

The CRON expression you provided was accepted - thank you!




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