Reference to an unknown method or property (UnknownMember)

Type	Scope	Severity	Activated by default	Minutes to fix	Tags
Error	BSL OS	Major	No	2	suspicious

Description

The diagnostic detects references to methods and properties that do not exist — likely typos or calls to a non-existent API:

• Receiver.Member — the receiver type is inferred and concrete, but it has no member with that name;
• a bare Name(...) call — the name resolves neither to a global function/property of the platform or the configuration, nor to a method/variable of the current module.

The diagnostic relies on type inference and member data from the 1C platform syntax assistant (via bsl-context) or the bundled reference. When the receiver type cannot be inferred or is arbitrary/undefined, the diagnostic stays silent to avoid false positives.

The diagnostic is disabled by default — it is heuristic and needs validation on real configurations (reference completeness, dynamic typing, etc.).

Examples

Массив = Новый Массив;
Массив.Добвить(1); // Triggers: a typo, type Массив has no method "Добвить"

Fix it by using an existing member:

Массив.Добавить(1);

Sources

• Source: 1C:Enterprise 8 platform syntax assistant

Snippets

Diagnostic ignorance in code

// BSLLS:UnknownMember-off
// BSLLS:UnknownMember-on

Parameter for config

"UnknownMember": false