mem0ai/mem0 · error · Error

Failed to update vector: ${error instanceof Error ? error.me

Error message

Failed to update vector: ${error instanceof Error ? error.message : String(error)}

What it means

Generic catch wrapper around the Vectorize update path: any exception (including the non-ok HTTP throw from the sibling branch, network failure, or serialization error) is logged and rethrown as 'Failed to update vector: <message>'. The inner message identifies the true failure.

Source

Thrown at mem0-ts/src/oss/src/vector_stores/vectorize.ts:185

        {
          method: "POST",
          headers: {
            "Content-Type": "application/x-ndjson",
            Authorization: `Bearer ${this.client?.apiToken}`,
          },
          body: JSON.stringify(data) + "\n", // ndjson format
        },
      );

      if (!response.ok) {
        const errorText = await response.text();
        throw new Error(
          `Failed to update vector: ${response.status} ${errorText}`,
        );
      }
    } catch (error) {
      console.error("Error updating vector:", error);
      throw new Error(
        `Failed to update vector: ${error instanceof Error ? error.message : String(error)}`,
      );
    }
  }

  async delete(vectorId: string): Promise<void> {
    await this.initialize();
    try {
      await this.client?.vectorize.indexes.deleteByIds(this.indexName, {
        account_id: this.accountId,
        ids: [vectorId],
      });
    } catch (error) {
      console.error("Error deleting vector:", error);
      throw new Error(
        `Failed to delete vector: ${error instanceof Error ? error.message : String(error)}`,
      );
    }

View on GitHub (pinned to 001c235229)

Solutions

1. Unwrap and act on the inner message (auth/dimension/index-name fixes as in the sibling error).
2. Retry with backoff for transient causes; updates upsert by id so a retry is safe.
3. Refresh the API token if credentials are the cause.

try { await memory.update(id, data); } catch (e) { const m = e instanceof Error ? e.message : ''; if (m.startsWith('Failed to update vector:') && isTransient(m)) await retryWithBackoff(() => memory.update(id, data), 3); else throw e; }

When it happens

Trigger: Any exception during memory.update(): network drop mid-request, expired token, inner 4xx from the upsert endpoint, TypeError building the NDJSON body.

Common situations: Serverless timeouts cutting the request; rotated API tokens; transient Cloudflare 5xx on upsert.

Related errors

• Failed to insert vectors: ${error instanceof Error ? error.m
• Failed to search vectors: ${error instanceof Error ? error.m
• Failed to update vector: ${response.status} ${errorText}
• Failed to insert vectors: ${response.status} ${errorText}
• Failed to get vector: ${error instanceof Error ? error.messa

AI-assisted analysis of mem0ai/mem0@001c235229 (2026-08-15). Data as JSON: /api/errors/66fd66dc56f11101. Report an issue: GitHub.