Hello,

I'm trying to implement a workflow that would trigger if a custom picklist field value related to contacts is selected, 'W9'. 

This is the formula I have, and I'm getting the error that I've entered an Incorrect parameter type for function 'TEXT()', but I don't see an option within formula operators that would apply to alphanumeric strings . . . here is what I have:
AND
(TEXT(EnrollmentrxRx__Active_Enrollment_Opportunity__r.Integration_Applicant_Type__c)='W9',
　
ISBLANK(TEXT(EnrollmentrxRx__Active_Enrollment_Opportunity__r.Integration_Applicant_Type__c)) )