# LibTmux.UnsupportedQueryExpressionException

- **Module:** LibTmux
- **Package:** LibTmux
- **Language:** C#
- **Kind:** class
- **Source:** https://github.com/libtmux/libtmux-dotnet/blob/cf34b255c896d19a97e7d7fabea58609c916012d/src/LibTmux/Exceptions/UnsupportedQueryExpressionException.cs#L9
- **Page:** https://libtmux.org/en/csharp/latest/reference/libtmux-unsupportedqueryexpressionexception/

Thrown when an expression cannot be translated to a query.

Translation never falls back to client evaluation. Silently evaluating an
untranslatable node would make one predicate mean different things
depending on where it ran.

## Members

### Other members

- `Expression` (property): Gets the expression that could not be translated.
- `UnsupportedQueryExpressionException` (method): Initializes the exception for one untranslatable expression.