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TIBCO iProcess® Engine 11.10.0

# PROC_VER_NUM_INSTANCES

Procedure Configuration

## Summary

This attribute defines how many old instances of a procedure are kept in the iProcess database. The most recent instance of a procedure version is always kept. See the Example.

## Applies To

This attribute must be set for ALL processes.

## Permissible Values

The attribute value must be one of the following:

Value | Meaning
0 | There is no limit to the number of instances of a procedure that are kept. This is the default value.
n | `n` number of instances of a procedure will be kept in the iProcess database (where `n` is a positive integer).

## Default Value

This attribute is not defined on a newly installed iProcess Engine node. In this case, the default value is:

Machine ID | Process | Instance | Value
0 | ALL | 0 | 0

The attribute only appears in the output of the `SHOW_ALL_ATTRIBUTES` command if you have explicitly assigned a value to it using the `SET_ATTRIBUTE` command. The default setting is not displayed.

## Notes

Every time you edit and save a version of a procedure, iProcess creates a new instance of that procedure version.

The `PROC_VER_NUM_INSTANCES` attribute applies to all old instances of a procedure. Each procedure instance is allocated an instance identifier. Each time a new instance is created the instance identifier is incremented by one.

The instances of a procedure are tidied up as when a procedure is saved. This is because a tidy operation is performed each time a procedure is saved which tidies up the number of instances according to the attribute value you have set.

The first time you set the attribute you can run the `swadm tidy_instances` command to force a tidy operation to tidy up the number of instances of some or all of your procedures, depending on your requirements. To do this you need to run the `swadm tidy_instances` command. See Tidy Instances of Procedures for more information.

For more information about the use of version numbering with procedures, see “Using Version Control” in TIBCO iProcess Modeler Procedure Management.

## See Also

DEF_MAJOR_VERS, DEF_MINOR_VERS, PROC_VER_COMMENT, PROC_VER_INC

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