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Amy ColinAmy Colin 

I'm getting this error when trying to override standard button of a custom object that is part of a managed package: "The value of a parameter contains a character that is not allowed or the value exceeds the maximum allowed length." Any suggestions?

Specifically, the standard button is being overridden by a visualforce page.  Oddly, I do not encounter the error in our sandbox, but I do in production.
AbhinavAbhinav (Salesforce Developers) 
Hi Amy,

This seems very generic error . Some of the instance of occurence of this error have been discussed on below link. Please check those suggestion

https://salesforce.stackexchange.com/questions/165824/the-value-of-the-parameter-contains-a-character-that-is-not-allowed-or-the-va

https://developer.salesforce.com/forums/?id=9062I000000IWOdQAO

Thanks!