Z_ERR = 0.0 for the stellar solver

When an input is a stellar spectrum (attached), with following values for relevant parameters and a set of templates attached, I got Z_ERR = 0.0 in pfsZcandidates*.fits. (the derived redshift corresponds to an estimated velocity within several km/s of the input value, which is excellent.) 

"lambdarange": [

        "3000",

        "10000"

    ],

    "redshiftrange": [

        "-0.001",

        "0.001"

    ],

    "redshiftstep": "0.000001",

 "enablestellarsolve": "yes"