MQ问题 3011 : MQRCCF_CFST_STRING_LENGTH_ERR 如何解决

我查询通道的是否出现这个错误
[ERROR] [2011-02-24 11:33:05.875]initialize Error!
com.ibm.mq.pcf.PCFException: MQJE001：完成码 2，原因 3011
at com.ibm.mq.pcf.PCFMessageAgent.send(PCFMessageAgent.java:247)
at com.mocha.bsm.resourcemodel.plugin.mqplugin.MQPCFAgentChannelMetric.initialize(Unknown Source)
at com.mocha.bsm.resourcemodel.plugin.mqplugin.MQPCFAgentChannelMetric.<init>(Unknown Source)
at com.mocha.bsm.resourcemodel.plugin.mqplugin.MQMetricResults.A(Unknown Source)
at com.mocha.bsm.resourcemodel.plugin.mqplugin.MQMetricResults.run(Unknown Source)
at java.lang.Thread.run(Thread.java:534)

我在网上查了一下是说 :
MQRCCF_CFST_STRING_LENGTH_ERR
结构长度无效。
MQCFST StringLength 字段值无效。此值是负的或大于参数字段中参数指定的最大允许长度。

正确的操作：指定可用的参数字符串长度。

但是如何设置参数字符串的长度呢？请高手赐教，感激不尽。

以下是我的代码实现：
        request = new PCFMessage (CMQCFC.MQCMD_INQUIRE_CHANNEL);
        // add a parameter designating the name of the channel for which status is requested
        request.addParameter(CMQCFC.MQCACH_CHANNEL_NAME, targetName);
        // add a parameter designating the instance type (current) desired
       request.addParameter(CMQCFC.MQIACH_CHANNEL_TYPE, PCFConstants.MQCHT_ALL);
        try
        {
            responses = agent.send(request);
                //System.out.println("Total Number of response:"+responses.length);
                for (int i=0; i < responses.length; i++)
                {
                    //  get the channel name and trim the spaces
                    //String temp = responses [i].toString();
                   // System.out.println(i+"*************"+temp);
                    Enumeration enu = responses [i].getParameters();
                    while(enu.hasMoreElements()){
                        Object key = (Object) enu.nextElement();
                        PCFParameter pcfParam = (PCFParameter)key;

                        //System.out.println("getParameter:"+pcfParam.getParameter());
                        //System.out.println("getStringValue:"+pcfParam.getStringValue());
                        map.put(String.valueOf(pcfParam.getParameter()), pcfParam.getStringValue());
                    }
                }
            // Disconnect
            agent.disconnect ();
            //System.out.println ("Done.");
        }
        catch (Exception e)
        {
         if(agent!=null) {
         agent.disconnect();
log.error("Disconnection Completed!");
         }
         log.error("initialize Error!", e);
            e.printStackTrace();
            throw e;
        }

补充：企业软件 ,  中间件