# \#faq **URL:** https://community.labelstud.io/tag/faq/18.md [Latest](https://community.labelstud.io/latest.md) · [Categories](https://community.labelstud.io/categories.md) · [Tags](https://community.labelstud.io/tags.md) --- ## [Having Difficulties in defining relations during Annotation](https://community.labelstud.io/t/having-difficulties-in-defining-relations-during-annotation/665)
**Author:** [@Amazon](https://community.labelstud.io/u/Amazon)\ **Replies:** 0\ **Last updated:** [December 18, 2025, 6:06am UTC](https://community.labelstud.io/t/having-difficulties-in-defining-relations-during-annotation/665 "2025-12-18T06:06:27Z")
The UI is not working to add a relation between 2 bounding boxes. In some cases, it is able to add but many times it doesn’t connect the bounding boxes. Please help to resolve the issue. --- ## [What are the Annotator and Task Limits in the Community Version of Label Studio?](https://community.labelstud.io/t/what-are-the-annotator-and-task-limits-in-the-community-version-of-label-studio/165)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 2\ **Last updated:** [August 21, 2025, 7:04pm UTC](https://community.labelstud.io/t/what-are-the-annotator-and-task-limits-in-the-community-version-of-label-studio/165 "2025-08-21T19:04:02Z")
Question: For the community version of Label Studio, what are the maximum number of annotators per project and the maximum number of tasks? Moreover, if multiple annotators launch their own instances of Label Studio, ho… --- ## [Using Label Studio to verify and modify OCR results](https://community.labelstud.io/t/using-label-studio-to-verify-and-modify-ocr-results/623)
**Author:** [@nadil](https://community.labelstud.io/u/nadil)\ **Replies:** 0\ **Last updated:** [August 21, 2025, 8:48am UTC](https://community.labelstud.io/t/using-label-studio-to-verify-and-modify-ocr-results/623 "2025-08-21T08:48:35Z")
Hello, I would like to know if it is possible to use Label Studio to verify my OCR results. Specifically, I want to import a scanned document with bounding boxes around each extracted field, allowing us to select and mod… --- ## [What is the replacement tag or writing method of Repeater tag or how to customize the columns of Table and List tag?](https://community.labelstud.io/t/what-is-the-replacement-tag-or-writing-method-of-repeater-tag-or-how-to-customize-the-columns-of-table-and-list-tag/492)
**Author:** [@who\_x](https://community.labelstud.io/u/who_x)\ **Replies:** 2\ **Last updated:** [February 7, 2025, 3:39am UTC](https://community.labelstud.io/t/what-is-the-replacement-tag-or-writing-method-of-repeater-tag-or-how-to-customize-the-columns-of-table-and-list-tag/492 "2025-02-07T03:39:11Z")
I want to render multiple lines at a time, and each line may have components such as text and text field. The number of lines is not fixed --- ## [Getting help in fixing issue and some assistance](https://community.labelstud.io/t/getting-help-in-fixing-issue-and-some-assistance/446)
**Author:** [@ShreyasK](https://community.labelstud.io/u/ShreyasK)\ **Replies:** 5\ **Last updated:** [January 4, 2025, 7:55pm UTC](https://community.labelstud.io/t/getting-help-in-fixing-issue-and-some-assistance/446 "2025-01-04T19:55:44Z")
Version : 1.13.1 Setup: locally hosted using docker I have tried label studio multiple features including label ml backend can you help me fix my issues I have uploaded all the images in the replies please check the s… --- ## [Handling rotated bounding boxes when exporting from Label Studio to COCO or YOLO](https://community.labelstud.io/t/handling-rotated-bounding-boxes-when-exporting-from-label-studio-to-coco-or-yolo/182)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 2\ **Last updated:** [December 21, 2024, 12:21pm UTC](https://community.labelstud.io/t/handling-rotated-bounding-boxes-when-exporting-from-label-studio-to-coco-or-yolo/182 "2024-12-21T12:21:32Z")
Question: How can I maintain the rotated bounding box orientation when I export my annotated data from Label Studio into COCO or YOLO formats? The bounding boxes are always exported as non-rotated boxes. Answer: The YOL… --- ## [Validation error \`\`ML Backend health check failed''](https://community.labelstud.io/t/validation-error-ml-backend-health-check-failed/209)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 2\ **Last updated:** [December 17, 2024, 12:44pm UTC](https://community.labelstud.io/t/validation-error-ml-backend-health-check-failed/209 "2024-12-17T12:44:02Z")
Question: My ml backend is up and running but still I am not able to connect it with my label studio. Both ml backend and label studio running on docker. Answer: Try using the following url: http://host.docker.i… --- ## [Gliner annotations input format help](https://community.labelstud.io/t/gliner-annotations-input-format-help/366)
**Author:** [@Garv](https://community.labelstud.io/u/Garv)\ **Replies:** 0\ **Last updated:** [October 2, 2024, 11:10pm UTC](https://community.labelstud.io/t/gliner-annotations-input-format-help/366 "2024-10-02T23:10:50Z")
Gliner model.py file takes into input labelled tasks for fine-tuning, however label studios output format does not include text tokens , but gliner requires tokens and labels as input for fine-tuning. How can I modify my… --- ## [Troubleshooting image loading issue in Label Studio with local storage paths](https://community.labelstud.io/t/troubleshooting-image-loading-issue-in-label-studio-with-local-storage-paths/181)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 1\ **Last updated:** [August 20, 2024, 9:23am UTC](https://community.labelstud.io/t/troubleshooting-image-loading-issue-in-label-studio-with-local-storage-paths/181 "2024-08-20T09:23:16Z")
Question: I’ve set LABEL\_STUDIO\_LOCAL\_FILES\_SERVING\_ENABLED=true and LABEL\_STUDIO\_LOCAL\_FILES\_DOCUMENT\_ROOT=C:\\User\\YOLO\\dataset\\ to the environment. However, after converting my YOLO dataset with the Label Studio Conve… --- ## [Polygon points not added when clicking quickly](https://community.labelstud.io/t/polygon-points-not-added-when-clicking-quickly/256)
**Author:** [@Tai\_DOAN](https://community.labelstud.io/u/Tai_DOAN)\ **Replies:** 2\ **Last updated:** [June 21, 2024, 10:42am UTC](https://community.labelstud.io/t/polygon-points-not-added-when-clicking-quickly/256 "2024-06-21T10:42:08Z")
Hi everyone, I’m using Polygons in Label Studio to label images. I notice that when I click quickly, the new polygons are not added. Please check out my screen record: https://youtu.be/bUG0dskt1Pk What is strange is th… --- ## [Preventing Annotation Overwrite in Label Studio Community Edition](https://community.labelstud.io/t/preventing-annotation-overwrite-in-label-studio-community-edition/217)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 24, 2024, 4:21pm UTC](https://community.labelstud.io/t/preventing-annotation-overwrite-in-label-studio-community-edition/217 "2024-05-24T16:21:15Z")
Question: In Label Studio Community Edition, is there any way to keep user A from altering the task annotations made by user B, for instance, to prevent accidental deletion of another user’s ratings? Answer: Unfortuna… --- ## [Cannot read properties of undefined (reading 'URL\_CORS\_DOCS") error in Label Studio](https://community.labelstud.io/t/cannot-read-properties-of-undefined-reading-url-cors-docs-error-in-label-studio/214)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 24, 2024, 4:12pm UTC](https://community.labelstud.io/t/cannot-read-properties-of-undefined-reading-url-cors-docs-error-in-label-studio/214 "2024-05-24T16:12:52Z")
Question: How do I fix the error “Cannot read properties of undefined (reading ‘URL\_CORS\_DOCS’)” I receive when I click on a task created in Label Studio after importing from Azure Blob Storage using the Python SDK? A… --- ## [How can I hide annotations from other annotators in Label Studio?](https://community.labelstud.io/t/how-can-i-hide-annotations-from-other-annotators-in-label-studio/213)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 24, 2024, 4:09pm UTC](https://community.labelstud.io/t/how-can-i-hide-annotations-from-other-annotators-in-label-studio/213 "2024-05-24T16:09:25Z")
Question: Is there a method in Label Studio to ensure each annotator works independently on their annotations, unaware of the contributions from their colleagues? Answer: In Label Studio Open Source, task visibility a… --- ## [Resolving CSV Import Parsing Errors in Label Studio](https://community.labelstud.io/t/resolving-csv-import-parsing-errors-in-label-studio/203)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 21, 2024, 7:50pm UTC](https://community.labelstud.io/t/resolving-csv-import-parsing-errors-in-label-studio/203 "2024-05-21T19:50:39Z")
Question: Sometimes while attempting to import a CSV file into Label Studio as a series of tasks, the following parsing error is encountered: Error at item 0: "image\_url" key is expected in task data \[assume: item\["da… --- ## [Filtering Tasks by Most Recent Annotation Update in Label Studio](https://community.labelstud.io/t/filtering-tasks-by-most-recent-annotation-update-in-label-studio/202)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 21, 2024, 7:48pm UTC](https://community.labelstud.io/t/filtering-tasks-by-most-recent-annotation-update-in-label-studio/202 "2024-05-21T19:48:10Z")
Question: Is there an available method to filter tasks in Label Studio by the most recent updated\_at timestamp for a task’s annotations? Currently, the “completed” filter seems to interpret the most recent created\_at ti… --- ## [Resolving "Label Studio not recognized" Command Error after Installation](https://community.labelstud.io/t/resolving-label-studio-not-recognized-command-error-after-installation/194)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 16, 2024, 5:16pm UTC](https://community.labelstud.io/t/resolving-label-studio-not-recognized-command-error-after-installation/194 "2024-05-16T17:16:35Z")
Question: A user is encountering a problem when trying to launch Label Studio after installing it via pip install -U label-studio in Visual Studio Code. Here’s the problem they’re facing: I installed Label Studio using… --- ## [How to Download Task Source for All Tasks in a Label Studio Project?](https://community.labelstud.io/t/how-to-download-task-source-for-all-tasks-in-a-label-studio-project/179)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 13, 2024, 6:28pm UTC](https://community.labelstud.io/t/how-to-download-task-source-for-all-tasks-in-a-label-studio-project/179 "2024-05-13T18:28:52Z")
Answer: Yes, downloading task sources for all tasks in a project is possible using the Label Studio API or SDK. Method 1: Using the Label Studio API Use the /api/projects/{id}/export endpoint. To include tasks without … --- ## [How to use RLHF to evaluate chatbot responses](https://community.labelstud.io/t/how-to-use-rlhf-to-evaluate-chatbot-responses/178)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 13, 2024, 6:24pm UTC](https://community.labelstud.io/t/how-to-use-rlhf-to-evaluate-chatbot-responses/178 "2024-05-13T18:24:44Z")
Question: I have a chatbot and how I use RLHF is evaluating its response? Could anyone please provide me in detail docs or tutorials about it? Answer: To utilize RLHF for evaluating your chatbot, check out this Label … --- ## [Why is enabling Local Storage by default considered unsafe in Label Studio?](https://community.labelstud.io/t/why-is-enabling-local-storage-by-default-considered-unsafe-in-label-studio/176)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 13, 2024, 6:07pm UTC](https://community.labelstud.io/t/why-is-enabling-local-storage-by-default-considered-unsafe-in-label-studio/176 "2024-05-13T18:07:44Z")
Answer Enabling Local Storage by default is considered unsafe because it allows any user or process with access to the Label Studio instance to read data from your local folders, potentially exposing sensitive or private… --- ## [Retrieving Project ID and Filename Random Strings in Label Studio](https://community.labelstud.io/t/retrieving-project-id-and-filename-random-strings-in-label-studio/173)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 10, 2024, 6:42pm UTC](https://community.labelstud.io/t/retrieving-project-id-and-filename-random-strings-in-label-studio/173 "2024-05-10T18:42:01Z")
Question: How can I retrieve the project ID and the 8-character random string prepended to image names after uploading images to Label Studio via a GET request to the Label Studio API? Moreover, what exactly is this 8-c… --- ## [How to Add a Collaborator to Local Virtual Machine for Annotation Projects](https://community.labelstud.io/t/how-to-add-a-collaborator-to-local-virtual-machine-for-annotation-projects/169)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 10, 2024, 6:15pm UTC](https://community.labelstud.io/t/how-to-add-a-collaborator-to-local-virtual-machine-for-annotation-projects/169 "2024-05-10T18:15:25Z")
Question I’m running an annotation project on a local virtual machine and encountered trouble when trying to add a collaborator. Although I have shared the organization signup link, my collaborator is unable to access i… --- ## [Is Local Data in Label Studio Community Edition Collected by HumanSignal?](https://community.labelstud.io/t/is-local-data-in-label-studio-community-edition-collected-by-humansignal/168)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 10, 2024, 6:12pm UTC](https://community.labelstud.io/t/is-local-data-in-label-studio-community-edition-collected-by-humansignal/168 "2024-05-10T18:12:23Z")
Question: Does the local data inputted in Label Studio get stored in online databases that could potentially be accessed by the Label Studio team, or does it remain private? Answer: For users of the Label Studio Commu… --- ## [Storing Label Studio Annotations in a Single CSV File and Importing Tasks with JSONL](https://community.labelstud.io/t/storing-label-studio-annotations-in-a-single-csv-file-and-importing-tasks-with-jsonl/167)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 1\ **Last updated:** [May 10, 2024, 6:07pm UTC](https://community.labelstud.io/t/storing-label-studio-annotations-in-a-single-csv-file-and-importing-tasks-with-jsonl/167 "2024-05-10T18:07:55Z")
Question: Can Label Studio be configured to store all tasks and their annotations in a single CSV file on the target storage instead of generating one JSON file per task? Answer: Currently, Label Studio does not offer… --- ## [Securing Label Studio Access on EC2: Invite-Only Registration](https://community.labelstud.io/t/securing-label-studio-access-on-ec2-invite-only-registration/166)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 10, 2024, 5:59pm UTC](https://community.labelstud.io/t/securing-label-studio-access-on-ec2-invite-only-registration/166 "2024-05-10T17:59:13Z")
Question: I’ve hosted Label Studio on an EC2 machine with a public IP, and I’m looking for advice on how to restrict access so that only approved users can sign up and use the interface. As of now, the link allows for u… --- ## [How to Rename the Target Column in Annotation Results for Text Classification Projects](https://community.labelstud.io/t/how-to-rename-the-target-column-in-annotation-results-for-text-classification-projects/164)
**Author:** [@sajarin](https://community.labelstud.io/u/sajarin)\ **Replies:** 0\ **Last updated:** [May 10, 2024, 5:49pm UTC](https://community.labelstud.io/t/how-to-rename-the-target-column-in-annotation-results-for-text-classification-projects/164 "2024-05-10T17:49:42Z")
Question: In a text classification project, using the sentiment analysis template has automatically set my target column name to “sentiment” in the annotation results. I want to rename this to something that better fits…