Class●Since v1.1

LangChainError

Base error class for all LangChain errors.

All LangChain error classes should extend this class (directly or indirectly). Use LangChainError.isInstance(obj) to check if an object is any LangChain error.

class LangChainError

Bases

Error

Example

try {
  await model.invoke("hello");
} catch (error) {
  if (LangChainError.isInstance(error)) {
    console.log("Got a LangChain error:", error.message);
  }
}

Constructors

constructor

Properties

property

cause: unknown

The underlying error that caused this ContextOverflowError, if any.

This property is optionally set when wrapping a lower-level error using ContextOverflowError.fromError. It allows error handlers to access or inspect the original error that led to the context overflow.

property

message: string

property

name: string

property

stack: string

property

isInstance: IsInstanceFn

property

stackTraceLimit: number