Updating the directory definition file

To update the directory definition file, you can edit the data set that is used to construct the directory definition file. You can edit the file while VTAM® is running, but CMIP services reads the updated file by using one of the following methods:

If CMIP services is active, edit the directory definition file and then load it by issuing the MODIFY TABLE command:
```
MODIFY proc,TABLE,OPT=LOAD,TYPE=CMIPDDF
```
If the new directory definition file is not syntactically correct, the old table continues to be used.
Note that associations that were allowed with the previous directory definition file can remain in effect until CMIP services is restarted. Even if you update the directory definition file to indicate that a particular association is no longer allowed, that association can remain in effect until CMIP services is restarted. The MODIFY TABLE command does not cause previous associations to come down, even if they are not allowed in the updated directory definition file.
If CMIP services is active, stop CMIP services by issuing the MODIFY VTAMOPTS command with the OSIMGMT=NO start option and then restart CMIP services by issuing the MODIFY VTAMOPTS command with the OSIMGMT=YES start option
Restart VTAM with the OSIMGMT=YES start option.

When CMIP services is started (either when VTAM is initialized with the OSIMGMT=YES start option or when the MODIFY VTAMOPTS command is issued with the OSIMGMT=YES start option), CMIP services reads the directory definition file from member ACYDDF. The SYS1.SISTCMIP data set that contains member ACYDDF is read and processed when CMIP services is started.

The directory definition file cannot be displayed with the DISPLAY TABLE command. You cannot see what the directory definition file contains. The directory definition file is not like other user-defined tables. You can specify the member name of other user-defined tables on the MODIFY TABLE command, but for the directory definition file, the member name is always ACYDDF. To change the directory definition file, edit ACYDDF and replace its current contents.