Custom button/Save URL

Question

I have created a custom create button since we cannot define a lookup value with an action. I have created the button, but when I go to test it states that the URL no longer exists. I copied the url from the standard create button:

https://cs54.salesforce.com/setup/ui/recordtypeselect.jsp?ent=01I150000017oVu&retURL=%2F0060S000002E9GH&save_new_url=%2Fa03%2Fe%3FCF00N1500000CxfPc%3DAgent%2BTest%2B-%2B2017-03-21%26CF00N1500000CxfPc_lkid%3D0060S000002E9GH%26retURL%3D%252F0060S000002E9G

My custom button:

/setup/ui/recordtypeselect.jsp?ent=01I150000017oVu
&save_new_url==%2F{Quotes_RFR.Id}
&retURL=%2F{!Opportunity.Id}
&00N1500000HvjMd={!Opportunity.OwnerFullName}
&00N1500000Cxfq6={!Opportunity.Sales_Support_Contact__c}
&00N1500000Cxfsc={!Opportunity.Date_Received__c}
&00N1500000Cxfrg={!Opportunity.Date_Due__c}
&00N1500000CxftK="Being Worked"

After I select the record type I get the error:

Invalid Page Redirection The page you attempted to access has been blocked due to a redirection to an outside website or an improperly coded link or button. Please contact your salesforce.com Administrator for assistance. For more information, see Insufficient Privileges Errors.

Answer 1

I think there is == in save_new_url==%2F{Quotes_RFR.Id} make it single =.

And use URLENCODE function for substitution.

/setup/ui/recordtypeselect.jsp?ent=01I150000017oVu
&save_new_url=/{!URLENCODE (Quotes_RFR.Id)}
&retURL=/{!URLENCODE (Opportunity.Id)}
&00N1500000HvjMd={!URLENCODE(Opportunity.OwnerFullName)}

Answer 2

In past, had faced similar issues due to encoding of parameters, without which URL becomes invalid as error message suggests.

Should use URLENCODE for all the parameters.

Like:

{!URLENCODE(Opportunity.OwnerFullName)}

Answer 3

After much research and trial and error this worked /setup/ui/recordtypeselect.jsp?ent=01I150000017oVu &save_new_url=a03/e &retURL={!Opportunity.Id} &CF00N1500000HvjMd={!Opportunity.OwnerFullName} &CF00N1500000HvjMd_lkid={!User.Full_Name__c} &CF00N1500000CxfPc={!Opportunity.Name} &CF00N1500000Cxfq6={!Opportunity.Sales_Support_Contact__c} &00N1500000Cxfsc={!Opportunity.Date_Received__c} &00N1500000Cxfrg={!Opportunity.Date_Due__c}