奇怪的报错信息，unknown token type returned: token(45)

用的go1.16.15 使用的sqlserver2008r2数据库，github.com/denisenkom/go-mssqldb 下面代码中报错， 报错的代码行为 row = tx.QueryRow("select cast(newid() as varchar(40)), CONVERT(CHAR(10),GETDATE(), 120) ") err := row.Scan(&guidstr, &currdate) 错误信息为:unknown token type returned: token(45) 有大佬知道这是什么原因不？有解决的方法吗？

tx, err = xjcdb.DB.Begin()
if err != nil {
    log.Println(err.Error())
    return 0, "", err
}
defer tx.Rollback()

   ......
   ......

rows, err = tx.Query(...)
if err != nil {
    log.Println(err.Error())
    return 0, "", err
}
defer rows.Close()

for rows.Next() {
    loop_beltcode = ""
    loop_pkfeeobj = ""
    err = rows.Scan(&loop_beltcode, &loop_pkfeeobj)
    if err != nil {
        log.Println(err.Error())
        return 0, "", err
    }
    guidstr = ""
    currdate = ""
    row = tx.QueryRow("select cast(newid() as varchar(40)), CONVERT(CHAR(10),GETDATE(), 120) ")
    err := row.Scan(&guidstr, &currdate)
    if err != nil {
        return 0, "", err
    }
            ......
            ......
  }
  .....