verilog A: analog user function and global prameter ---> pbleme with spectre

Hello,

In the VA LRM doc v 2.3.1 I read (in section 4.7.1) for analog fucntion

-shall only reference locally-defined variables, variables passed as arguments, locally-defined parameters
and module level parameters

so I expext this to be functionnal:

module test (T1, T2);

parameter real X0 = 1;

real x;

 analog function real f;
    input  x;
    real x, x0;
    begin
        f = x + X0;
    end
endfunction

analog begin

x=0;

test = f(x);

end

endmodule

But i the folowing error message

  ERROR (VACOMP-1008): Cannot compile ahdlcmi module library. Check the log file input.ahdlSimDB/3605_sdk_models_model_source_XXXXXXXXX.ahdlcmi/Linux/../ahdlcmi.out for details. If the compiler ran out of memory, use 'setenv CDS_CMI_COMPLEVEL 0', and try again. If the reason for the failure was a syntax error, contact your Cadence Customer Support representative with the netlist, log files, behavioral model files, and any other information that can help identify the problem.
    ERROR (SFE-91): Error when elaborating the instance XXXXX. Simulation should be terminated.

Why ?

regards,

Fabrice