This approach is suitable for both short term remote access and permanent operation of the remote computer.
remote desktop can be used for displaying the desktop of remote physical computer or remote desktop
There are multiple ways of achieving that. Most commonly, the instruments integrated in
versions (e.g. server) allow to offer the
3. hwkey - Hardware (USB) licence keya) For new HW Keys
distributed since 1.5.2022 and for the PROMOTIC system since version Pm9.0.21 Windows Remote Desktop (RDP protocol) works
without limitations, see hwkey - Hardware (USB) licence key
The PROMOTIC system has direct access to the licence on this carrier. The number of running applications in RDP
mode is monitored locally directly by the PROMOTIC system.
Information about RDP support for a particular licence key can be found:
- in the PmManager
program - see Licence/Available HW Keys (hwk=rdp:1;
- in the application log file on the licence number line (hwk=rdp:1;)
b) For older HW Keys
distributed before 1.5.2022 and/or for the PROMOTIC system older than version Pm9.0.21 Windows Remote Desktop (RDP protocol) does not work
PROMOTIC does not have direct access to the licence on this carrier. The licence can be read by the local licence server PmLicServer
In the RDP
mode, the number of running applications is monitored by the local licence server.
The main problem connected with operation of the PROMOTIC system via Windows
remote desktop by the RDP
protocol is the limitation of permissions of the program launched in user mode by the remote user.
The PROMOTIC application launched this way does not have access to the HW Key
) and therefore cannot read its licence. PROMOTIC behaves as there is no licence key present in the USB
port of the computer (physical or virtual).
On the other hand, a program running as service, launched by the Windows
remote desktop (remote user session), can access the HW Key. This can be used in order to solve the licece access problem of the PROMOTIC system via the Windows
PmLicServer licence server
(included in the PROMOTIC installation) is usually running as Windows
service thus having access to the HW Key even in Windows
remote desktop mode (RDP
This is important because PmLicServer
itself is protected by its HW Key and this protection is functional even in remote desktop session. PmLicServer
provides network licences to PROMOTIC applications via the network protocols HTTP
The applications can be located on the same computer (localhost
) or on other computers in the network.
The practical solution for licencing PROMOTIC application that are managed or operated via Windows
remote desktop (RDP
) is to run the PmLicServer
licence server simultaneously on the same computer with the specific PROMOTIC application.
This way it is possible to overcome the limitation of the PROMOTIC application problem on Windows
remote desktop while all necessary software
components are concentrated on a single computer.
This is a standard solution of licencing local PROMOTIC application by PmLicServer
that provides the application with a licence either on hwkey - Hardware (USB) licence key
or netkey - Network licence key
This is a recommended solution for Windows
remote desktop (RDP
) limited access to the HW Key
This solution requires the computer (service) to have access to the HW Key
). If this is a virtual computer, then it is necessary to let it have access to the HW Key
This can be achieved by software means (accesing the USB on physical HOST
of the computer as USB on a virtual computer GUEST
) or by means of another HW device that allows to operate virtual USB ports via Ethernet.
Accessing licences contained in the HW Key via the local licence server:
Application ini file: