How do I bypass class extensions when reading from ArcSDE?

I'm trying to read Feature Class from our Enterprise Geodatabase and because we have custom class extensions registered on all our our data.  

 

I am not able to set the Reader to bypass the class extensions.

 

 

I get this warning in the log

 

 

"Unable to read from the table/feature class 'YK_SPATIAL.Buildings'. If 'YK_SPATIAL.Buildings' contains a class extension, make sure it is registered on this computer"

 

 

Thanks