Force_merge_pll_fanouts

I create a sopc system with 2 HPCs the same clock, In "An 462" document writes "The Force Merging of PLL Clock Fanouts assignment will automatically be assigned in the Quartus II software." but when i complie that is a warning:

Critical Warning: Ignored assignment FORCE_MERGE_PLL_FANOUTS which contains an invalid node name "*|ddr2_bot_phy_alt_mem_phy_clk_reset:clk|ddr2_bot_phy_alt_mem_phy_pll:*:altpll_component|*:auto_generated|clk[1]"

Critical Warning: Ignored assignment FORCE_MERGE_PLL_FANOUTS which contains an invalid node name "*|ddr2_top_phy_alt_mem_phy_clk_reset:clk|ddr2_top_phy_alt_mem_phy_pll:*:altpll_component|*:auto_generated|clk[2]"

I think no problem, but SDRAM not working (write and read) when i test in NIOS II SBT ! what shoud I do?