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How to resolve issues with the MDT 26 installer

Updated on 3 September 2026 tcpMDT Leer en español

After installing the program, opening the CAD and trying to run a command shows one of these errors:

Board not found («Placa no encontrada» in the Spanish interface): you have installed a program with Sentinel SuperPro licensing.
Feature not found: you have installed a program with Sentinel LDK licensing.

In both cases the first thing to check is that MDT26 uses the same licensing system as the MDT version you were using until now.

Checking which licensing system you have

If you have not uninstalled the previous version yet, run its About Tcp-MDT command and look at the middle of the window, next to the serial number:

[number] SP or [number] SPN — programs with Sentinel SuperPro licensing.
[number] LDK — programs with Sentinel LDK licensing.

If you have already uninstalled the previous version of MDT, you can check the type of USB key you have in How do I determine what type of protection has been supplied to me?. If you have no USB key, go to the Driver folder inside the MDT26 installation (by default C:\Program Files (x86)\Aplitop\MDT26) and run LDKDiag.exe to find out whether you have an LDK software license.

Sentinel SuperPro licensing

Run the About Tcp-MDT command in MDT26. If an exclamation mark (!) appears next to the serial number, your license cannot run MDT26 — either because it has no maintenance contract, or because the version you purchased is older than MDT26. You need to buy a maintenance contract or upgrade your MDT license: contact your dealer to request it.

LDK licensing: "Feature not found"

If your licensing system is LDK and the error you get is Feature not found, your license has most likely not been updated correctly. Open the license manager in your browser at http://localhost:1947.

Check that you have a license installed on your computer. You should see a Local license from Vendor 2138536 —the same number that appears in the name of the driver file, haspdinst_2138536.exe—; the icon may also be that of a USB key.
Only follow the steps below if the location of the license is Local. If the license lives on another computer, the steps have to be run on the license server machine.
Go to Configuration > Network.
Check that the EMS URL field contains https://aplitop.prod.sentinelcloud.com.
If it does not, add a new line with that URL.
Press Submit to save the changes, and carry on with the activation process.
Open this address in your browser: https://aplitop.prod.sentinelcloud.com/customer/login and press the Update/Sync Licenses Online button at the bottom.
After a few seconds, the local license should be updated.