The client cannot check out a license because the server reports the license as already in use (hot), but the client session has no valid handle to it.
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IT Engineering Support Status: Resolvable within 30 minutes under normal conditions, unless "hot" indicates hardware failure (Scenario B), which requires physical intervention.
: In complex network environments, especially those using the FlexNet Publisher system, license manager status inquiries may return internal numeric codes through tools like lmstat . The "2100 Hot" could be one such internal status that isn't exposed in user-facing documentation. autodesk license status 2100 hot
To minimize licensing disruptions, use a dedicated tool to track license usage and proactively renew subscriptions. For network administrators, the Portable License Utility (PLU) is helpful for moving licenses between computers, though it's only supported in versions 2009 and earlier. Meanwhile, tools like LMTOOLS can be used to check server status and perform status enquiries. Additionally, make sure your ADSKFLEX_LICENSE_FILE variable points to the correct license server.
The most common cause of license issues is the licensing service not running. Press Start , type Services , and press Enter.
The license file contains an invalid HOT flag or the client is using a patched adskflex.exe that the newer Autodesk version detects as tampered. The client cannot check out a license because
If you are dealing with a specific software configuration,g., AutoCAD 2025, 3ds Max 2024).
If using , check the Config Services tab to ensure the server is active.
SERVER host1 001122334455 2080 HOT # <-- "HOT" not recognized by lmgrd If you share with third parties, their policies apply
By creating friction with Network Licenses (the 2100 error being the primary friction point), Autodesk creates a strong incentive for companies to abandon the network model entirely. They want you off the server and onto their cloud. They want every single user to have an individual Autodesk ID so they can track usage, upsell features, and ensure 100% compliance.
Because Error 2100 is a local-server mismatch, the fix focuses on resetting the local license cache and ensuring clean communication. Here is the most effective sequence:
On the , use LMTOOLS to clear hot licenses:
Using an old version of LMTOOLS (FlexNet License Manager) with a new Autodesk product release often triggers status 2100. For example, running AutoCAD 2025 on an LMTOOLS 2018 version will fail.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\7346B4A0-2100-0510-0000-705C0D862004 On the right, find InstallLocation