AI

Error Handling

Handling regular errors

Regular errors are thrown and can be handled using the try/catch block.

import { generateText } from 'ai';


try {
  const { text } = await generateText({
    model: yourModel,
    prompt: 'Write a vegetarian lasagna recipe for 4 people.',
  });
} catch (error) {
  // handle error
}

See Error Types for more information on the different types of errors that may be thrown.

Handling streaming errors (simple streams)

When errors occur during streams that do not support error chunks, the error is thrown as a regular error. You can handle these errors using the try/catch block.

import { generateText } from 'ai';


try {
  const { textStream } = streamText({
    model: yourModel,
    prompt: 'Write a vegetarian lasagna recipe for 4 people.',
  });


  for await (const textPart of textStream) {
    process.stdout.write(textPart);
  }
} catch (error) {
  // handle error
}

Handling streaming errors (streaming with error support)

Full streams support error parts. You can handle those parts similar to other parts. It is recommended to also add a try-catch block for errors that happen outside of the streaming.

import { generateText } from 'ai';


try {
  const { fullStream } = streamText({
    model: yourModel,
    prompt: 'Write a vegetarian lasagna recipe for 4 people.',
  });


  for await (const part of fullStream) {
    switch (part.type) {
      // ... handle other part types


      case 'error': {
        const error = part.error;
        // handle error
        break;
      }
    }
  }
} catch (error) {
  // handle error
}