how to set multiple ddr_hp_controller pin-name prefixes in one project?

Thank you for your response! :)

I have two ddr interfaces. I have created two pin assignment tcl files by editing the original variation_pin_assingment.tcl. In each new pin assignment file, I replaced the original "mem" prefix with the new one, such as "a_mem" and "b_mem", respectively. Then, I ran the new "variation_a_pin_assignments.tcl" and "variation_b_pin_assignments.tcl" before I compile the project. But only variation_a 's pins got recognized and grouped. I could not find the clear statement in altera manual regarding assign multiple prefixes for instantiating one ddr_hp_controller multi times. I have tried this on Quartus v.9.0 sp1 and v.9.1 sp 2, and got same errors:confused:.

liza_altera