beanshell 代码

String id=vars.get("pfid");
String ack=vars.get("access_token");
// vars.get("access_token")

vars.put("access_token",ack);

vars.put("pfid", id);
props.put("access_token",ack);
props.put("pfid", id));

报错内容

ERROR o.a.j.u.BeanShellInterpreter: Error invoking bsh method: eval Sourced file: inline evaluation of: ``String id=vars.get("pfid"); String ack=vars.get("access_token"); // vars.get("ac . . . '' : Method Invocation props.put

WARN o.a.j.e.BeanShellPostProcessor: Problem in BeanShell script: org.apache.jorphan.util.JMeterException: Error invoking bsh method: eval Sourced file: inline evaluation of: ``String id=vars.get("pfid"); String ack=vars.get("access_token"); // vars.get("ac . . . '' : Method Invocation props.put

ERROR o.a.j.u.BeanShellInterpreter: Error invoking bsh method: eval In file: inline evaluation of: ``String id=vars.get("pfid"); String ack=vars.get("access_token"); // vars.get("ac . . . '' Encountered ")" at line 9, column 22.