Establishing the cause of the problem
Introduction to problem determinationHow this book can help youHow this book is organizedPreliminary checksHas WebSphere MQ for z/OS run successfully before?Are there any error messages or return codes that explain the problem?Can you reproduce the problem?Have any changes been made since the last successful run?Has the application run successfully before?Does the problem affect specific parts of the network?Does the problem occur at specific times of the day?Does the problem affect all users of the application?Does the problem occur with all z/OS, CICS, or IMS systems?Is the problem intermittent?Have you applied any APARs or PTFs?Do you have a program error?What to do nextExamining the problem in greater depthHave you obtained some incorrect output?Have you received an unexpected error message?Has there been an abend?Common causes of abendsAddress space dumps and transaction dumpsAbnormal program terminationHave you failed to receive a response from an MQSC command?