Stored Procedure stopped working after applying a PTF?

Here is the change we had to make:

Before change

C/Exec Sql 
C+ Set Result Sets Array :ResultSet For :xx Rows            
C/End-Exec                                                          


After change
                                                                    
C/Exec Sql                                                          
C+ Set Result Sets WITH RETURN TO CLIENT Array :ResultSet For :xx   
C+ Rows                                                             
C/End-Exec  

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