Etabs License Not Recognized Error 120 Work Info

Encountering an "Error 120" in ETABS is understandably frustrating, but it's almost always a fixable problem. The solution path is clear:

: A discrepancy between the system hardware clock and the verification window embedded within the license string invalidates authentication.

The most common culprit in modern computing environments is the Windows Firewall or third-party antivirus software. The CSI License Manager communicates via specific TCP/IP ports. By default, this is often Port 5053 (though it can vary based on the CSI_license.dat file). etabs license not recognized error 120 work

Antivirus and firewall software frequently interfere with the license activation process. Temporarily disabling them during activation can resolve Error 120.

This guide was last updated based on CSI technical documentation available as of 2026. Software versions and procedures may change; always refer to the official CSI knowledge base (wiki.csiamerica.com) for the most current information. Encountering an "Error 120" in ETABS is understandably

). If it is missing or corrupted, the program will fail to recognize the license. CSI Knowledge Base Advanced Troubleshooting

Use this utility within the installation folder to view the current license type and its expiration date. If it shows as "expired," you must reactivate your license. 2. Adjust System Date and Format The CSI License Manager communicates via specific TCP/IP

For network/floating licenses, ETABS must know exactly where to look on your office network to find the license server. If it cannot find it, Error 120 triggers immediately.

Open your CSiLicensing subfolder. Deactivate your standalone license and then reactivate it using your key.