Dongle Setup & Troubleshooting 

Prior to using your dongle-based licenses you must install a dongle driver. Click here to download the Flexera Dongle Driver Installation Guide.

If you have counted licenses, the 32-bit Synopsys Common Licensing software must also be installed and started. A 64-bit (x86_64) Windows or Linux server is capable of running a 32-bit version of SCL.


For the Windows OS, Synopsys recommends that the SCL server be started on Windows 7 or Windows Server 2008 R2. Only x86_64 CPUs are supported.

For the Windows OS, after installing SCL, make sure the dongle ID is recognized by Windows. For the dongle ID to be seen by FLEXnet, a FLEXid software driver must be installed. Synopsys supports Dallas or Rainbow dongles for maintenance renewals; however, new orders should be placed only for the FLEXid=9 USB dongle. (At this time, Synopsys does not support FLEXid=10 dongles. Sentinel SuperPro dongles are supported only for uncounted Windows-based licenses.)

If the dongle is not recognized, the cause may be that no dongle driver is installed, or the existing driver is obsolete.

For the Windows OS, follow the steps below to resolve this problem.

  1. Start “lmtools” (provided with SCL). lmtools is located in the scl_root\win32\bin directory.

  2. Click Help > About. The lmtools version number must be 11.10 or higher.

  3. Click the System Setting tab and make sure the correct FLEXid shows in the "FLEXID" field matches the FLEXid imprinted on the dongle.

  4. If the correct FLEXid shows, then go to Step 5. If no FLEXid shows, or an incorrect FLEXid shows, follow these steps:

    1. For a USB dongle, make sure it attached directly to the system and not to a USB hub device. For a parallel-port dongle, make sure it is attached directly to the parallel port, not to another dongle.

    2. Remove and reinsert the dongle.

    3. Uninstall any old drivers via the Add or Remove Programs Control Panel applet. These may have names like Aladdin HASP, Globetrotter FLEXid Driver, Macrovision FLEXid Driver, Rainbow Technologies Sentinel or Sentinel System Drivers.

    4. Restart the system.

    5. Install the FlexNet dongle drivers. These drivers are included with SCL 11.x in the scl_root\win32\drivers directory.

    6. Depending on your dongles, install one or all of the FLEXid 6_7, FLEXid 8, or FLEXid 9 drivers.

    7. Reboot and repeat steps 1 and 2.

  5. Once the FLEXid is recognized, start the SCL license server with lmtools. For details on starting SCL on Windows, click here.

  6. After SCL is started, go to Control Panel > System > Advanced > Environment Variables and set the licensing variable SNPSLMD_LICENSE_FILE or LM_LICENSE_FILE to point to the license server. For example, set SNPSLMD_LICENSE_FILE to 27000@my_server.