Where can I find I/O OBUF primitive ?

[Altera_Forum]

Hello! 

 What element should be connected to the output of altddio_out so, that it will be possible to connect the output of altddio_out to any element in the schematic ( . bdf )? If I connect the output of altddio_out directly to any element in the schematic ( . bdf ), then Quartus qives out an error:  Error (15873): Output port DATAOUT of DDIO_OUT primitive "aes_output:inst9|altddio_out:altddio_out_component|ddio_out_2ad:auto_generated|ddio_outa[0]" must drive input port I of an I/O OBUF primitive  But where can I find i/o obuf primitive ?  I coudn't find it , instead I found alt_outbuf, but using it instead of i/o obuf also resuts in Quartus errors.

[Altera_Forum]

--- Quote Start ---  Hello! What element should be connected to the output of altddio_out so, that it will be possible to connect the output of altddio_out to any element in the schematic ( . bdf )? If I connect the output of altddio_out directly to any element in the schematic ( . bdf ), then Quartus qives out an error: Error (15873): Output port DATAOUT of DDIO_OUT primitive "aes_output:inst9|altddio_out:altddio_out_component|ddio_out_2ad:auto_generated|ddio_outa[0]" must drive input port I of an I/O OBUF primitive But where can I find i/o obuf primitive ?  I coudn't find it , instead I found alt_outbuf, but using it instead of i/o obuf also resuts in Quartus errors.  --- Quote End ---     Is there a synthesis setting to stop IO buffers being inserted (for when you're black boxing a pieve of code) that is accidentally enabled?  Nial.