PLL config error of problem

[Altera_Forum]

Good afternoon every body  

 near I creat a new project , my project need use two groups PLL ,  (My use chip - CyclonII EP2C35FC8)  and I reference the pin config ↓  (http://www.altera.com/literature/dp/cyclone2/ep2c35.pdf)   So first PLL input config , I use pin_n2 (50MHZ Input) ,   also two output : 100MHZ & 100MHZ -65°deg .  And second PLL input config , I use pin_p26 (125MHZ input)  also three output : 125MHZ 0°deg & 125MHZ 90°deg & 125MHZ 180°deg .   To here my compilation haven't not problem .  Because my hardware require , So I need change config of second PLL pin ,  but , when I change second PLL input config ,  pin_p26 replaced by pin_p1 or pin_p2 and compilation .  The QuartusII will tell me :   Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in target device due to device constraints  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_1 because location is already occupied by node "Enth:Enth_inst|enet_rx_clk_pll:the_enet_rx_clk_pll|altpll:sd1|pll"  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_2 due to device constraints  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_2 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_P26 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_P26 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_2 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_P25 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_P25 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_2 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_N26 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_N26 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_2 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_N25 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_N25 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_3 due to device constraints  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_3 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_B13 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_B13 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_3 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_A13 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_A13 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_3 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_C13 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_C13 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_3 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_D13 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_D13 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_4 due to device constraints  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_4 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_AC13 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_AC13 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_4 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_AD13 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_AD13 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_4 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_AF14 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_AF14 because it is already placed in I/O pin Pin_N2  Error: Can't place PLL "Enth:Enth_inst|pll_0:the_pll_0|altpll:sd1|pll" in PLL location PLL_4 because I/O cell "iCLK_50" cannot be placed in I/O pin Pin_AE14 (port type INCLK of the PLL)  Error: Can't place I/O cell "iCLK_50" in I/O pin location Pin_AE14 because it is already placed in I/O pin Pin_N2    I don't know understand ... pin_p1 or pin_p2 are clk_input   what can't use pin_p26 replaced by pin_p1 or pin_p2 ...