Solidworks Host File Block Fix (ULTIMATE · 2024)
SolidWorks is the gold standard for CAD design, but few things are more frustrating than being in the zone, modeling a complex assembly, and suddenly being hit with a License Error (-15, -97, or -5) or a complete crash. Often, the culprit isn't corrupt software or bad hardware—it is your own Windows Hosts File .
The "SolidWorks host file block fix" is a legacy method. In modern versions (SolidWorks 2022 SP5 and newer), Dassault introduced and staggered heartbeat checks . If you are using a legitimate Student or Commercial license, the Hosts file block will cause SolidWorks to enter "Grace Period" mode and eventually lock you out after 30 days. solidworks host file block fix
127.0.0.1 activation.solidworks.com 127.0.0.1 upgrade.solidworks.com 127.0.0.1 crashdump.solidworks.com 127.0.0.1 performance.solidworks.com 127.0.0.1 solidworks.licensing.3ds.com 127.0.0.1 license.3ds.com 127.0.0.1 dslic.solidworks.com Yes, but with caveats. SolidWorks is the gold standard for CAD design,
The hosts file is a plain text file used by your operating system to map hostnames to IP addresses. It has priority over DNS (Domain Name System). When you type www.google.com , your PC checks the Hosts file first. If it finds an entry, it goes there without asking the internet. In modern versions (SolidWorks 2022 SP5 and newer),
The Hosts file is a powerful tool, but it is a scalpel, not a hammer. Used correctly, it silences validation noise. Used blindly, it breaks your internet resolution. Edit wisely.
# SolidWorks License Block List 127.0.0.1 localhost 127.0.0.1 swx.licensing.com 127.0.0.1 licensing.solidworks.com 127.0.0.1 register.solidworks.com 127.0.0.1 solidworks.com.licensing.com 127.0.0.1 lmtools.com 127.0.0.1 ############################### ::1 localhost If you are running a local SolidWorks License Server (LMTOOLS) on your own machine (IP 127.0.0.1 ), you might need to redirect the service:
Check the SolidWorks official forums or your local reseller for legitimate network licensing support.
