Initializing help system before first use

# XpressProblem Fields

The XpressProblem type exposes the following members.

Fields

| Name | Description
--- | --- | ---
| callbacks | Property through which callbacks for this instance can be accessed.
| NULL_VARIABLE | Variable object that is used to indicate a constant term in expressions that are implemented as maps.

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See Also

#### Reference

XpressProblem Class
Optimizer.Objects Namespace
Covered Topics

- callbacks Field
- NULL_VARIABLE Field

Parent Topic XpressProblem Class

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