Introduction

Corrective service is the process of installing a SYSMOD to resolve a specific problem in your system. The problem has usually been brought to your attention because the system has not functioned as expected (for example, an abend has occurred, or jobs are not running as expected).

The first task is to investigate the problem, so that the failing component and module can be identified. SMP/E for z/OS Messages, Codes, and Diagnosis provides helpful information about diagnosing and handling SMP/E problems. This can be done in conjunction with the IBM® Support Center. SMP/E can help you work with the IBM Support Center to isolate and obtain a fix for the problem. Useful information includes:

The function and service level of the module involved
The service level of your system—that is, the specific SYSMODs that have been installed
Any USERMODs involved
The affected load modules

After determining the cause of the error, you want a fix for the problem. There are several possibilities:

The problem has already been reported, and a PTF has been created to fix the module. That PTF may not have been shipped on an ESO. If it has been shipped, you should have it in your shop (already received). If not, the IBM Support Center can help you get a copy of it, or you can use ShopzSeries and the RECEIVE ORDER command to order the PTF from the Automated Service Delivery server.
The PTF identified by the Support Center may have been received but not yet applied. Use the LIST command or the SMP/E Query dialog to check the status of the PTF.
The problem has been previously reported. No PTF has been created, but an APAR fix is available either to fix or to bypass the problem.
The problem is a new one, and no fix is available. In this case, you have to work with the IBM Support Center to construct a fix for your system.

No matter where you obtain the fix, the installation of that fix is said to be in corrective mode.

Note: You can use either the SMP/E dialogs or JCL jobs to build, receive, apply, and accept corrective service. The basic steps to follow are the same. If you have access to the SMP/E dialogs, you should use them. Otherwise, you can use the steps described in this topic as examples.