Install and manage .tsep extensions

Tekla Structures extension packages (.tsep packages) are Tekla Structures extensions that you can import to the Applications & components catalog. You can also copy .tsep extensions to new versions of Tekla Structures, and uninstall imported extensions that are no longer needed.

Tekla Structures extensions are not part of the Tekla Structures product release. You can download .tsep packages from Tekla Warehouse. For more information, see Download and install content from Tekla Warehouse

You can install .tsep extensions in these ways:

Using the Tekla Structures extension manager in the Applications & components catalog
Directly from the file system
Automatically for each user from a shared folder
Centrally for all users

You can remove .tsep installed extensions in these ways:

Using the Tekla Structures extension manager
Using the Tekla Structures Extension Package (TSEP) builder and test runner
Centrally for all users

Import .tsep extensions using Tekla Structures extension manager in the Applications & components catalog

Before you begin, download the .tsep extension from Tekla Warehouse. For more information, see Download content from Tekla Warehouse.

Click the Applications & components button in the side pane to open the Applications & components catalog.
Click > Manage extensions > Extension manager.
In the Tekla Structures extension manager dialog, click Import.
Browse to the location where you saved the .tsep extension, then double-click the .tsep extension.

Tekla Structures opens a dialog that lists the installed Tekla Structures versions that are compatible with the extension. If none of the installed Tekla Structures versions are compatible, the compatible versions are listed.
Select the Tekla Structures versions into which you want to import the extension.
Click Import.

The extension is shown in the Tekla Structures extension manager in all the Tekla Structures versions that you selected.
Restart Tekla Structures to install the imported extension.

The extension is shown in the Ungrouped items group in the Applications & components catalog. You can move the extension to another existing group, or create a new group.

Tip: In Tekla Structures extension manager, you can list the extensions by type: extension or environment. You can also search for content based on name, author, description, and type of extension.

Install .tsep extensions directly from the file system

Before you begin, download the .tsep extensions from Tekla Warehouse. For more information, see Download content from Tekla Warehouse. You can also run some .tsep installers directly from Tekla Warehouse using the Insert into model option. For more information, see Insert Tekla Warehouse content into a Tekla Structures model.

Double-click the .tsep installer that you downloaded.

If the .tsep installer does not automatically open with Tekla Structures extension manager, right-click the .tsep installer, then select Properties. In Opens with, click Change, then browse to TsepFileDispatcherLauncher.

The Tekla Structures extension manager dialog opens and shows the name of the extension that will be installed.
Select the Tekla Structures versions into which you want to import the extension.
Click Import.

The extension is shown in the Tekla Structures extension manager in all the Tekla Structures versions that you selected.
Restart Tekla Structures to install the imported extension.

The extension is shown in the Ungrouped items group in the Applications & components catalog. You can move the extension to another existing group, or create a new group.

Tip: In Tekla Structures extension manager, you can list the extensions by type: extension or environment. You can also search for content based on name, author, description, and type of extension.

Install .tsep extensions automatically from a shared folder

By default, extensions are automatically installed from the \ProgramData\Trimble\Tekla Structures\<version>\Extensions\To be installed folder on each user's computer. You can use the XS_TSEP_TO_BE_INSTALLED_ORG_DIR advanced option to automatically install .tsep extensions from a shared folder instead.

The XS_TSEP_TO_BE_INSTALLED_ORG_DIR advanced option specifies the location of the folder from which .tsep extensions are automatically installed. When you set this advanced option in the user.ini file for each user, any .tsep packages in the shared folder are automatically installed when users restart Tekla Structures.

Create a folder in a shared location, such as under the firm folder.
Copy one or more .tsep packages to the shared folder.
Set the value of the XS_TSEP_TO_BE_INSTALLED_ORG_DIR advanced option to the location of the shared folder in the user.ini file for each user.

You can also instruct users how to set the value of this advanced option in their own user.ini files.

The extensions are installed when users restart Tekla Structures. Different extensions might be installed for different users at different times.

Install .tsep extensions centrally

By default, extensions are automatically installed from the \ProgramData\Trimble\Tekla Structures\<version>\Extensions\To be installed folder on each user's computer. You can centrally install a batch of .tsep extensions on all company workstations using the %XSDATADIR%\Extensions\To be installed folder.

When Tekla Structures starts, it checks the available .tsep installers from the \To be installed folder and installs them automatically. If there is an older version of the same extension package, it is uninstalled before installing the new version. Installation is canceled if the same or newer version has already been installed.

The installed .tsep installers are stored in the %XSDATADIR%\Extensions\Installed folder.
Invalid .tsep installers are uninstalled and moved to the %XSDATADIR%\Extensions\Invalid installations folder.
Canceled .tsep installers are stored in %XSDATADIR%\Extensions\Cancelled installations.

If the %XSDATADIR%\Extensions\To be installed folder does not yet exist, create it.
Copy the .tsep installers to the %XSDATADIR%\Extensions\To be installed folder.

We recommend that you use ROBOCOPY from the command prompt (cmd.exe) to copy the .tsep installers. You can find more information about ROBOCOPY on the Microsoft website.

The basic syntax for ROBOCOPY is: robocopy<Source> <Destination> [<File>[ ...]] [<Options>]
For example, this command copies all .tsep installers from the \Server1 network directory to the local user's \To be installed folder. in Tekla Structures 2026.

After copying, TepAutoInstaller.exe installs all .tsep installers from the local user's \To be installed folder. Installing the packages in this way allows users to start Tekla Structures without first waiting for the installations to complete.
```
robocopy
"\\Server1\prod\TeklaStructures\2026.0\Environments_TSEP"
"C:\ProgramData\Trimble\Tekla Structures\2026.0\Extensions\To be installed"
*.tsep
"C:\Program Files\Tekla Structures\2026.0\bin\TeklaExtensionPackage.TepAutoInstaller.exe"
2026.0 "C:\ProgramData\Trimble\Tekla Structures\2026.0" "2026"
```

Update installed extensions

When updates for your installed extensions are available, you can download and install the updated .tsep packages in the same way as you install other .tsep packages.

To receive notifications when new versions of extensions are available, Subscribe to alerts about content updates in Tekla Warehouse.

If there is an older version of the same extension package, it is automatically uninstalled before installing the new version. Installation is canceled if the same or newer version has already been installed.

Copy .tsep extensions to a new Tekla Structures version

When you update to a new Tekla Structures version, you can use the Migration Wizard tool to copy the installed .tsep extensions to the new version.

Click the Applications & components button in the side pane to open the Applications & components catalog.
Click > Manage extensions > Migrate extensions.
Restart Tekla Structures to install the copied extensions.

Remove .tsep extensions using Tekla Structures extension manager

You can uninstall the installed extensions in Tekla Structures extension manager.

Uninstalling extensions creates a log file in the \Tekla Structures\<version>\Extensions\TSEP Logs folder.

Click the Applications & components button in the side pane to open the Applications & components catalog.
Click > Manage extensions > Extension manager.
Select one or more extensions in Tekla Structures extension manager.

Use Ctrl or Shift to select several extensions.
Click Remove.
Restart Tekla Structures to remove the extensions.

Remove .tsep extensions using Tekla Structures Extension Package (TSEP) builder and test runner

To open the Tekla Structures Extension Package (TSEP) builder and test runner dialog, browse to the \Program Files\Tekla Structures\<version>\bin folder, then double-click TeklaExtensionPackage.Builder.exe.
On the Uninstall TSEP based extensions tab, select the .tsep packages that you want to uninstall.

Use Ctrl or Shift to select more than one .tsep package.
Click Uninstall selected

The selected .tsep are removed. You do not need to restart Tekla Structures.

Remove .tsep extensions centrally

You can uninstall .tsep extensions in batches to remove them from all company workstations.

Create an empty file named RemoveExtensionOnStartup.
Copy this file to the folder for each extension that you want to uninstall on all users' computers.
For example, \ProgramData\Trimble\Tekla Structures\<version>\Extensions\Installed\<Extension_To_Be_Uninstalled>.

The extensions are removed the next time that users start Tekla Structures.