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  • Abdullah Abdullah 7
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SOLVED
3 replies

Error: Challenge requirement is not accepted by SalesForce Instance - Formulas & Validations / Using Formula Fields

Problem:  The challenge requires an API name of 'Days_Since_Last_Update__c' but my salesforce instance doesn't allow that name and delivers the following Error:
The custom field name you provided Days_Since_Last_Update__c on object Case can only contain alphanumeric characters, must begin with a letter, cannot end with an underscore or contain two consecutive underscore characters, and must be unique across all Case fields.

So, in effect, my interpretation is the challenge requires something that my salesforce instance doesn't allow, so I don't know how to get around it.  

I am sure the error is mine, but I would really appreciate some guidance on how to resolve.

Notes:
1)  I did mention this in another thread https://developer.salesforce.com/forums/ForumsMain?id=906F0000000BMfxIAG
2)  Here are a few screen shots for reference:
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