Domainvar_Get_List_of_Ref:list is too short
 

I was simulating a proton exchange membrane fuel cell model with UDF. In the UDF, there are codes

"float uds_urf[6];
float species_urf[3];
uds_urf[0] = 0.01;
uds_urf[1] = 0.01;
uds_urf[2] = 0.999;
uds_urf[3] = 0.01;
142
uds_urf[4] = 0.999;
uds_urf[5] = 0.999;
species_urf[0] = 1.0;
species_urf[1] = 1.0;
species_urf[2] = 1.0;
if (MY_COUNTER <= 50)
{
uds_urf[0] = 0.01;
uds_urf[1] = 0.01;
uds_urf[2] = 0.00001;
uds_urf[3] = 0.00001;
uds_urf[4] = 0.00001;
uds_urf[5] = 0.00001;
species_urf[0] = 1.0;
species_urf[1] = 1.0;
species_urf[2] = 1.0;
Domainvar_Set_Real(ROOT_DOMAIN_ID,"temperature/relax", 0.1);
}
else if (MY_COUNTER <= 100)
{
uds_urf[0] = 0.1;
uds_urf[1] = 0.1;
uds_urf[2] = 0.1;
uds_urf[3] = 0.1;
uds_urf[4] = 0.1;
uds_urf[5] = 0.1;
species_urf[0] = 1.0;
species_urf[1] = 1.0;
species_urf[2] = 1.0;
Domainvar_Set_Real(ROOT_DOMAIN_ID,"temperature/relax", 0.1);
}
Domainvar_Set_List_of_Float(ROOT_DOMAIN_ID, "uds/relax", uds_urf, 6);
Domainvar_Set_List_of_Float(ROOT_DOMAIN_ID, "species/relax", species_urf, 3);

But error happens when calculating"Error:Domainvar_Get_List_of_Ref. Error:object:()"

"
could someone help me