Issue with merging code coverage with different parameter values written in generate statements inside RTL

Hi, 

I've ran couple of tests for below RTL code. One with parameter COUNTER equal to 1 and another test with COUNTER equal to 0.  
Now, I could not merge the coverage for both tests cases. 
Command used for merging : merge cov_work/scope/* cov_work/scope_0/* -out all (in imc -batch)  
Warning message : *W,WEMMO1: Module/Generate/NamedBlock 'generate_check.genblk1_T' not merged because it is not present in target run.
*W,WEMIN1: Instance 'gen_tb.DUT.genblk1' and its hierarchy not merged with target instance 'gen_tb.DUT.genblk1' and its hierarchy - Mismatch in type names - Primary: worklib.generate_check.genblk1_F Secondary: worklib.generate_check.genblk1_T.
Total items not merged                      : 2

module generate_counter(clock, reset, count);

  input clock, reset ;
  output reg[3:0] count ;
  parameter COUNTER = 0;

  generate
    if (COUNTER == 1) begin
      always@(posedge clock) begin
      if (reset)
        count <= 4'b0;
      else
        count <= count +1;
      end
    end
    else begin
      always@(posedge clock) begin
      if (reset)
        count <= 4'b0;
      else
        count <= count +2;
      end
    end
  endgenerate

endmodule

Is there any way in imc to merge the coverage with both parameter values ?
Can someone please help me how to merge the coverage in such cases. 

Thanks.