---
name: vpc-fl-ts-failed-write
title: Why didn't data write to the flow log file in the past 24 hours?
description: A flow log collector publishes data to an IBM Cloud Object Storage bucket. If you see an entry in the error log with message ID `is.flow-log-collector.00001E`, the flow log collector failed to publish data due to either a Cloud Object Storage bucket that does not exist, or a bucket that was not accessible. An error message was sent each hour for the past 24 hours to take necessary action. Unfortunately, the data is lost.
last-updated: 2021-05-25
---

> ## Documentation Index
> The table of contents for this documentation set is at https://cloud.ibm.com/docs/vpc?format=markdown
> The index for all IBM Cloud docs is at: https://cloud.ibm.com/docs/llms.txt
> Use these files to discover more information as needed.

# Why didn't data write to the flow log file in the past 24 hours?
{: #fl-ts-error-failed-write}
{: troubleshoot}
{: support}

A flow log collector publishes data to an IBM Cloud Object Storage bucket. If you see an entry in the error log with message ID `is.flow-log-collector.00001E`, the flow log collector failed to publish data due to either a Cloud Object Storage bucket that does not exist, or a bucket that was not accessible. An error message was sent each hour for the past 24 hours to take necessary action. Unfortunately, the data is lost.
{: shortdesc}

Take immediate action to prevent further loss of data.
{: important}

The Object Storage bucket is not created, or is not accessible by the flow log collector:
   `is.flow-log-collector.00001E: Failed to write Flow Log file for the past 24 hours. Dropping flow log for Virtual Server <VSICRN>`
{: tsSymptoms}

The Object Storage bucket does not exist, or does not have correct permissions.
{: tsCauses}

Before this error message was logged, you received one of the following error messages each hour for 24 hours. Follow the resolution procedure for the error message that you received.
* [is.flow-log-collector.00002E: Unauthorized access to Cloud Object Storage bucket `<BucketName>`](https://cloud.ibm.com/docs/vpc?topic=vpc-fl-ts-error-unauth-access-cos&format=markdown)
* [is.flow-log-collector.00003E: Cloud Object Storage bucket `<BucketName>` was not found](https://cloud.ibm.com/docs/vpc?topic=vpc-fl-ts-error-cos-bucket&format=markdown)
{: tsResolve}