连接到SAP Quality System时，抛出Connection Exception异常

Question

在与SAP Quality System连接时，如果遇到了异常，则会发生ConnectionException。详情如下：

  

详细信息：ErrorCode = RFC_OK。 ErrorGroup = RFC_ERROR_COMMUNICATION。 SapErrorMessage = SAP_CMINIT3：rc = 20＆gt;连接到SAP网关失败

     

Connect_PM GWHOST = IPAddress ，GWSERV = sapgw02，SYSNR = 02

     

使用Unicode

的本地主机上的LOCATION CPIC（TCP / IP）      

ERROR合作伙伴'IP地址'未到达

App.Config中的连接字符串是：

value="sap://CLIENT=643;SYSTEM ID=QSG;LANG=;@A/**IPAddress**/01" 
value="sap://CLIENT=643;SYSTEM ID=QSG;LANG=;@A/**IPAddress**/02" 

key="userid" value="UserName" 
key="password" value="Password" 

程序代码

SAPBinding binding = new SAPBinding();
//SAPBinding binding1 = Skelta.SAPConnector.SAPAdapter.SAPConnection.binding;

binding.ReceiveTimeout = TimeSpan.MaxValue;
binding.SendTimeout = TimeSpan.MaxValue;
binding.EnableBusinessObjects = true;
binding.EnableSafeTyping = true;

EndpointAddress address = new EndpointAddress(SAPConnectionString);
ChannelFactory<IRequestChannel> factory = new ChannelFactory<IRequestChannel>(binding, address);

// add credentials
factory.Credentials.UserName.UserName = SAPUserName;
factory.Credentials.UserName.Password = SAPPassword;

// Open client
factory.Open(TimeSpan.MaxValue);

//get a channel from the factory
irc = factory.CreateChannel();
//open the channel
try
{
    irc.Open(TimeSpan.MaxValue);
}

请帮帮我