Resolving common connectivity problems

The most common errors are 084 and 086 in Open ClientConnect. These errors imply that LU 6.2 or TCP/IP cannot get the connection it requires to send the request. There are three possible causes:

1. Open ClientConnect or Mainframe Client Connect is not set up correctly.

   Verify that Open ClientConnect or Mainframe Client Connect was set up correctly.

2. Open ClientConnect or Mainframe Client Connect is not configured to the communications server as a transaction program that can be invoked.

   See your Open ClientConnect or Mainframe Client Connect installation guides.

3. The connection to the LAN Server is broken; a bridge or router is involved. Contact your network support staff.

A CSA can receive the following message or some other connectivity-related error message:

SQL Server unavailable or does not exist

To isolate the problem, perform these diagnostic actions:

1. First, verify that the LAN Server can be accessed by using isql on the mainframe to log on.

2. Verify that the Mainframe Client Connect machine has the client network DLLs it needs by using ISQL on the same machine to log on to the LAN Server.

3. Verify that the SERVICENAME in the attach record is valid.

4. Check the SYGWHOST macros (in Open Client customization) port number and IP address.

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