# OneAgent installation has failed. Installer returned error code: 1 **URL:** \ **Category:** Open Q&A\ **Tags:** installation, oneagent\ **Created:** [March 21, 2025, 9:36am UTC](https://community.dynatrace.com/t/oneagent-installation-has-failed-installer-returned-error-code-1/50828 "2025-03-21T09:36:36Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![vishnu\_kumar](https://avatars.discourse-cdn.com/v4/letter/v/df705f/32.png) [@vishnu\_kumar](https://community.dynatrace.com/u/vishnu_kumar)\ **Post date:** [March 21, 2025, 9:36am UTC](https://community.dynatrace.com/t/oneagent-installation-has-failed-installer-returned-error-code-1/50828/1 "2025-03-21T09:36:36Z")
Hi All, Am getting this error when upgrading Oneagents of the 1.281 versions. OneAgent installation has failed. Installer returned error code: 1 If the problem persists, please contact support . There is no documentation on what this error means. We retried the upgrade post oneagent restart, still same error. Has anyone faced this error? ---
**Author:** ![Peter\_Youssef](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/peter_youssef/32/14668_2.png) [@Peter\_Youssef](https://community.dynatrace.com/u/Peter_Youssef)\ **Post date:** [March 21, 2025, 9:50am UTC](https://community.dynatrace.com/t/oneagent-installation-has-failed-installer-returned-error-code-1/50828/2 "2025-03-21T09:50:03Z")
Hi [@vishnu\_kumar](https://community.dynatrace.com/user/66503) - You can try updating to the most stable version. - Share the support archive with Dynatrace support team for further investigation and sooner resolution. - Uninstall the current version, remove all related previous version files according to the OS  [Linux](https://docs.dynatrace.com/docs/ingest-from/dynatrace-oneagent/installation-and-operation/linux/operation/uninstall-oneagent-on-linux) or   [Win](https://docs.dynatrace.com/docs/ingest-from/dynatrace-oneagent/installation-and-operation/windows/operation/uninstall-oneagent-on-windows) Check the related troubleshooting reference: - [OneAgent troubleshooting — Dynatrace Docs](https://docs.dynatrace.com/docs/ingest-from/dynatrace-oneagent/oneagent-troubleshooting) Hoping it helps. BR, Peter ---
**Author:** ![Peter\_Youssef](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/peter_youssef/32/14668_2.png) [@Peter\_Youssef](https://community.dynatrace.com/u/Peter_Youssef)\ **Post date:** [March 21, 2025, 9:50am UTC](https://community.dynatrace.com/t/oneagent-installation-has-failed-installer-returned-error-code-1/50828/3 "2025-03-21T09:50:57Z")
Hello [@vishnu\_kumar](https://community.dynatrace.com/user/66503) If it possible to share log sample for more details. BR, Peter ---
**Author:** ![vishnu\_kumar](https://avatars.discourse-cdn.com/v4/letter/v/df705f/32.png) [@vishnu\_kumar](https://community.dynatrace.com/u/vishnu_kumar)\ **Post date:** [March 21, 2025, 12:12pm UTC](https://community.dynatrace.com/t/oneagent-installation-has-failed-installer-returned-error-code-1/50828/4 "2025-03-21T12:12:08Z")
Which log is required [@Peter\_Youssef](https://community.dynatrace.com/user/51369) ? ---
**Author:** ![Sajarra](https://avatars.discourse-cdn.com/v4/letter/s/e19adc/32.png) [@Sajarra](https://community.dynatrace.com/u/Sajarra)\ **Post date:** [March 21, 2025, 12:45pm UTC](https://community.dynatrace.com/t/oneagent-installation-has-failed-installer-returned-error-code-1/50828/5 "2025-03-21T12:45:27Z")
Hello Vishnu, You can either collect the ‘OneAgent Diagnostics’ from GUI or from command mode. GUI - Go to host settings and you can find it over there. Hope, your server is still communicating to Dynatrace. Command Line - [OneAgent configuration via command-line interface — Dynatrace Docs](https://docs.dynatrace.com/docs/shortlink/oneagentctl#create-support-archive) Once collected, please share the logs to Dynatrace support team for further investigation. ---
**Author:** ![Peter\_Youssef](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/peter_youssef/32/14668_2.png) [@Peter\_Youssef](https://community.dynatrace.com/u/Peter_Youssef)\ **Post date:** [March 21, 2025, 6:23pm UTC](https://community.dynatrace.com/t/oneagent-installation-has-failed-installer-returned-error-code-1/50828/6 "2025-03-21T18:23:21Z")
Hi [@vishnu\_kumar](https://community.dynatrace.com/user/66503) PFA resources: ![2025-03-21_22h20_25.png](https://global.discourse-cdn.com/dynatrace/original/3X/0/6/0677912dde2a470f0b9969a759fb8c51b4264785.png) > **[OneAgent files and disk space requirements on Windows](https://docs.dynatrace.com/docs/ingest-from/dynatrace-oneagent/installation-and-operation/windows/installation/disk-space-requirements-for-oneagent-installation-and-update-on-windows)** > > Learn the OneAgent directory structure and disk space requirements for OneAgent installation on Windows. BR, Peter ---
**Author:** ![Peter\_Youssef](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/peter_youssef/32/14668_2.png) [@Peter\_Youssef](https://community.dynatrace.com/u/Peter_Youssef)\ **Post date:** [March 21, 2025, 6:26pm UTC](https://community.dynatrace.com/t/oneagent-installation-has-failed-installer-returned-error-code-1/50828/7 "2025-03-21T18:26:28Z")
Hi [@vishnu\_kumar](https://community.dynatrace.com/user/66503) You can also follow the provided approach by [@Sajarra](https://community.dynatrace.com/user/83648) as an alternative method for collecting logs either to download it locally, or share it with Dynatrace for further analysis. KR, Peter ---
**Author:** ![vishnu\_kumar](https://avatars.discourse-cdn.com/v4/letter/v/df705f/32.png) [@vishnu\_kumar](https://community.dynatrace.com/u/vishnu_kumar)\ **Post date:** [April 11, 2025, 12:47pm UTC](https://community.dynatrace.com/t/oneagent-installation-has-failed-installer-returned-error-code-1/50828/8 "2025-04-11T12:47:40Z")
Thanks Everyone for the replies, I used “uninstall” script in the agent files and launched the update. Worked like charm