For electrical engineers, power system analysts, and renewable energy consultants, ETAP (Electrical Transient Analysis Program) is not just software—it is the industry standard for designing, simulating, and monitoring electrical power systems. However, even the most experienced engineers have faced that frustrating moment: You double-click the ETAP icon, the splash screen appears, and then—silence. Or worse, an obscure error message. Then, after digging through settings, you finally see it:
Variable Name: ETAP_LICENSE_SERVER Variable Value: @[Your_Server_IP_or_Name] Use code with caution. To apply this: Open in Windows. Click Environment Variables . Under System Variables , click New . Enter the values above and restart ETAP. 2. Network and Firewall Rules
The editor provides five available entries to store different license paths, allowing users to switch between various network keys (e.g., different office locations or project-specific keys). Local Computer (Stand-Alone):
: The editor typically provides five entries, allowing users to quickly switch between different network keys or configurations. Default Communication : ETAP uses etap license path selection verified
When you launch ETAP for the first time after installation, the ETAP License Wizard displays the . This tool allows you to specify where the ETAP security key (the USB key or software key) is located. There are two primary types of license path configurations:
The phrase appears during the initialization phase when the ETAP License Manager (ETAPLM) or the ETAP client application successfully validates the route to the license source.
Click the , Test , or OK button. The software will ping the path. If successful, the system will confirm the connection, completing the license path selection verification. Troubleshooting Path Verification Failures Then, after digging through settings, you finally see
: If the license is hosted on a remote server, select a different path entry and input the Server Name IP Address of the machine where the ETAP License Manager is installed. Verification : Upon entering the path, click
Regularly update the Sentinel HASP driver via the official ETAP or Thales software downloads page to prevent compatibility issues with newer Windows updates.
If these entries are missing, the system cannot locate the physical key, and verification will fail. Under System Variables , click New
Select , input port 5093 , and choose Allow the connection . Repeat the process for an Outbound Rule . Correcting Hostname Resolution Errors
If your server changes, modify the target path directly within the Windows environment: Open the .