（1）执行脚本
jmeter -n -t SinglePayment2.jmx -l SP_30.jtl，报如下错：
Creating summariser <summary>
Created the tree successfully using SinglePayment2.jmx
Starting the test @ Thu Dec 26 18:15:23 CST 2019 (1577355323456)
Waiting for possible Shutdown/StopTestNow/HeapDump/ThreadDump message on port 4445
summary = 0 in 00:00:00 = ******/s Avg: 0 Min: 9223372036854775807 Max: -9223372036854775808 Err: 0 (0.00%)
Tidying up ... @ Thu Dec 26 18:15:24 CST 2019 (1577355324979)
... end of run
（2）有一次执行脚本时，突然报了这个错，一开始还以为是jmeter出问题了，后面在网上查了下问题，各种方法都试了，就是不行。后面打开脚本偶然发现是自己忘了改参数化文件的路径，才想起来是自己中间删文件时，把脚本删除过一次，后面从window