Generate a System Dump

To generate a system dump:

Procedure

Allocate DDNAME SYSMDUMP pointing to the data set with the following DCB parameters:
```
RECFM=FB,LRECL=4160,BLKSIZE=4160.
```
To get the first dump, add the parameter FREE=CLOSE to your DD statement. The DD statement should appear as follows:
```
//SYSMDUMP DD DISP=SHR,DSN=MYID.EDAPTH.SYSMDUMP,FREE=CLOSE
```
To get the last dump, the statement should appear as follows:
```
//SYSMDUMP DD DISP=SHR,DSN=MYID.EDAPTH.SYSMDUMP
```
Only two IDs must have privileges to write into this data set: ISERVER and IADMIN. General server users DO NOT need read or write access to the SYSMDUMP data set.
To prevent Abend-AID from intercepting the dump, add:
```
//ABNLIGNR DD DUMMY
```
To prevent Language Environment from intercepting the dump, specify:
```
EDADUMPOPT=UAIMM in EDAENV DD
```
This enables you to get more accurate information reflecting the moment the abend actually occurs.
Save the entire job output for the server (including JES logs), and send it to Customer Support.

Result

Instead of using JCL allocations to add SYSMDUMP, the procedure described below can be used alternatively.

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