@PraveenaD 

you didn't do it properly in script

the error clearly says you should set either success or fail in your script

(function executeStep(inputs, outputs, stepResult, timeout) {

    var sysId = inputs.u_sysid;
    var tableName = inputs.u_tablename;

    var gr = new GlideRecord(tableName);
    gr.addQuery("sys_id", sysId);
    gr.query();
    if (gr.next()) {
        outputs.u_number = gr.getDisplayValue();
        stepResult.setOutputMessage("The number found.");

        // Set the official step status to success
        stepResult.setSuccess();
    } else {
        // Fallback or explicit failure logic
        stepResult.setOutputMessage("Something went wrong.");
        stepResult.setFailed();
    }

}(inputs, outputs, stepResult, timeout));

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