geth初始化为什么失败？

Question

Windows系统，安装了geth客户端，创建数据存放地址并初始化创世块为什么会报错？genesis.json文件内容：{ "nonce":"0x0000000000000042", "mixhash":"0x0000000000000000000000000000000000000000000000000000000000000000", "difficulty": "0x4000", "alloc": {}, "coinbase":"0x0000000000000000000000000000000000000000", "timestamp": "0x00", "parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000", "extraData": "0x", "gasLimit":"0xffffffff", "config": {} }