# DTM Library can not be uninstalled **URL:** \ **Category:** B&R Software & Runtime\ **Tags:** automation-studio\ **Created:** [February 19, 2025, 12:58pm UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945 "2025-02-19T12:58:46Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Patrick\_Schmitter](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/patrick_schmitter/32/489_2.png) [@Patrick\_Schmitter](https://community.br-automation.com/u/Patrick_Schmitter)\ **Post date:** [February 19, 2025, 12:58pm UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945/1 "2025-02-19T12:58:46Z")
Hi there I wan to install the AS Version 4.12. Before this installation there was AS 4.3 installed that the customer uninstalled and removed completely. Now i cannot install AS4.12 there is always an error that uninstalling DTM library 1.0400.170310.19599 is not possible. ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/a/a98fa2625c1e8cbd0906c580cce2d6348656a45a.png) ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/a/ad1a60148d9460b9cb59b035ed76c685fca713b2.png) Any thoughts?? Patrick ---
**Author:** ![florent.boissadier](https://avatars.discourse-cdn.com/v4/letter/f/FF8800/32.png) [@florent.boissadier](https://community.br-automation.com/u/florent.boissadier)\ **Post date:** [February 19, 2025, 1:10pm UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945/2 "2025-02-19T13:10:53Z")
Hi Patrick, There is the uninstaller in the folder of DTM library: `C:\ProgramData\BR\DTM` there is a exe `Uninstall B+R DTM.exe`. This should uninstall the DTM library Regards, Florent ---
**Author:** ![Patrick\_Schmitter](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/patrick_schmitter/32/489_2.png) [@Patrick\_Schmitter](https://community.br-automation.com/u/Patrick_Schmitter)\ **Post date:** [February 19, 2025, 1:13pm UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945/3 "2025-02-19T13:13:04Z")
Hi Florent I tried but ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/6/62b8f1b52a111cc9ac429e8ab6e6330f3e2f399a.png) it doesn’t work… ---
**Author:** ![florent.boissadier](https://avatars.discourse-cdn.com/v4/letter/f/FF8800/32.png) [@florent.boissadier](https://community.br-automation.com/u/florent.boissadier)\ **Post date:** [February 19, 2025, 1:15pm UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945/4 "2025-02-19T13:15:29Z")
Ah 😅 Hum I cannot help you more at the moment, maybe ask to your local B&R office or maybe someone here as an option. ---
**Author:** ![alexanderstieglbauer](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/alexanderstieglbauer/32/11452_2.png) [@alexanderstieglbauer](https://community.br-automation.com/u/alexanderstieglbauer)\ **Post date:** [March 4, 2026, 3:24pm UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945/5 "2026-03-04T15:24:30Z")
Hello @Patrick_Schmitter, I am facing a very similar issue right now. You opened this topic a while ago but do you maybe still remember if and how you were able to solve this problem? Thank you! Best Regards Alexander ---
**Author:** ![valerio.manenti](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/valerio.manenti/32/11712_2.png) [@valerio.manenti](https://community.br-automation.com/u/valerio.manenti)\ **Post date:** [March 4, 2026, 6:48pm UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945/6 "2026-03-04T18:48:21Z")
From AI: Error 1603 during DTM library uninstallation is a fatal MSI error often caused by locked files, corrupted registry entries, or insufficient permissions. Resolve this by closing all related applications, running the uninstaller as an administrator, or using the Microsoft Install/Uninstall Troubleshooter. **Common Solutions for Error 1603:** - **Elevated Permissions:** Right-click the installer/uninstaller and select “Run as Administrator”. - **Close Conflicting Processes:** Ensure all applications that might be using the DTM library (e.g., automation software, IDEs) are completely closed. - **Run Microsoft Troubleshooter:** Use the Microsoft Fix it tool to fix corrupt keys or registry entries preventing removal. - **Use Third-Party Uninstaller:** Tools like Revo Uninstaller can force-remove stubborn programs. - **Check File Permissions:** Ensure the user account has full control over the folder where the library is installed. I hope it helps Ciao Valerio ---
**Author:** ![Patrick\_Schmitter](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/patrick_schmitter/32/489_2.png) [@Patrick\_Schmitter](https://community.br-automation.com/u/Patrick_Schmitter)\ **Post date:** [March 5, 2026, 10:57am UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945/7 "2026-03-05T10:57:13Z")
Hi Alexander I remember it to be a permission issue. On this issue i found some solution strategies but i don’t remember witch one solved the problem. You need to make sure that your user has permission on the folder C:\ProgramData\SYCONnet. Sorry i missed updating the community entry when finding the solution. Cheers Patrick ---
**Author:** ![alexanderstieglbauer](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/alexanderstieglbauer/32/11452_2.png) [@alexanderstieglbauer](https://community.br-automation.com/u/alexanderstieglbauer)\ **Post date:** [March 9, 2026, 10:03am UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945/8 "2026-03-09T10:03:47Z")
Hello all, in our Case we were able to resolve the issue with the Revo Uninstaller Tool as suggested by @valerio.manenti It found some entry in the Windows registry and deleted it which deinstalled the Library and got a fresh installation to work. Thank you all for the help! Regards Alexander ---
**Author:** ![rafael.laury](https://avatars.discourse-cdn.com/v4/letter/r/FF8800/32.png) [@rafael.laury](https://community.br-automation.com/u/rafael.laury)\ **Post date:** [May 18, 2026, 8:44pm UTC](https://community.br-automation.com/t/dtm-library-can-not-be-uninstalled/5945/9 "2026-05-18T20:44:53Z")
Hi all, I want to confirm that the resolution provided by @alexanderstieglbauer worked for another customer to successfully uninstall AS and DTM when they were getting errors attempting to uninstall from “Add or Remove Programs”. The Revo Uninstaller Tool free version can be downloaded here: [https://www.revouninstaller.com/start-freeware-download/](https://www.revouninstaller.com/start-freeware-download/ "Follow link"). Thanks for finding this solution Alexander!