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Power Platform Community / Forums / Power Automate / invalide file name in ...
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invalide file name in file create

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the formula in Filename Create is "concat('AClist-', outputs('Compose'), '.xlsx')"
 
Copilot message is below:
It seems that the error occurred due to an invalid file name when creating the file. Check the file name parameter in the 'Create file' action to ensure it follows the correct format and does not contain any invalid characters. Make sure the file name is constructed properly using the necessary dynamic content or expressions.
 
"Compose: returns the following for the CONCAT
formatDateTime(utcNow(), 'yyyy-MM-dd-HHmmss')
 
Any recommendations?
 
Thanks
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Power Automate Fa...

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  • Michael E. Gernaey Profile Picture
    53,315 Super User 2025 Season 2 on at
    Hi
     
    I am sorry I am confused you said
     
    the formula in Filename Create is "concat('AClist-', outputs('Compose'), '.xlsx')"
     
    But then you said
    "Compose: returns the following for the CONCAT
    formatDateTime(utcNow(), 'yyyy-MM-dd-HHmmss')
     
    But I dont see how the Concat you had at the top could possibly return what you wrote just above this so I am confused.
     
     

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