Error: Can't assign node "<name_pll>" to any location (ID: 176359)

My apologies, I meant 14 registers or more. I'm trying to drive 14 register with clk27M. Here is a snippet of the code with 4 registers; there are 14 registers using this clk in total.

PLL PLL(.inclk(clk50M), .c0(clkA), .c1(clkB), .c2(clkC), .c3(clkD), .locked(pll_lock));

reg [7:0] a = '0;

always @ (posedge clkA)

a = (some conditional statement) ? a + 1 : 0;

reg[31:0][7:0] b = '0;

always @ (posedge clkA)

b[a[7:0]] = (some conditional statement) ? data : b[a[7:0]];

Thank you