loadrunner java 缺少必要的导入包报错

loadrunner 运行从eclipse中做好的脚本，ctrl + A 复制到loadrunner中来，

添加参数化的的语句：verifyCode =    lr.eval_string ("<rand6>");

报错：

Notify: Found jdk version: 1.6.0. [MsgId: MMSG-22986]
Notify: classpath=E:\performanceTest\3-性能测试\lr_hibox_script\;c:\program files (x86)\hp\loadrunner\classes\srv;c:\program files (x86)\hp\loadrunner\classes;.;C:\Program Files (x86)\Java\jdk1.6.0_45\lib\tools.jar;C:\Program Files (x86)\Java\jdk1.6.0_45\lib\dt.jar;E:\performanceTest\jar\fastjson-1.1.37.jar;E:\performanceTest\jar\hibox_for_lr.jar;E:\performanceTest\jar\protobuf-java-2.5.0.jar;;;;c:\program files (x86)\hp\loadrunner\lib\xstream-1.3.jar;c:\program files (x86)\hp\loadrunner\lib\xpp3-1.1.4c.jar [MsgId: MMSG-22986]
Error: Compilation process failed. [MsgId: MERR-22997]
Warning: Extension java_int.dll reports error -1 on call to function ExtPerProcessInitialize [MsgId: MWAR-10485]
Error: Thread Context: Call to service of the driver failed, reason - thread context wasn't initialized on this thread. [MsgId: MERR-10176]

原来是复制过来，导致原本的语句 import lrapi.lr;被覆盖，缺少语句就会报错，在脚本顶部增加这条语句，就会运行正常