Autodesk products using network licenses frequently encounter Error 85440: "Network License Not Available" (often accompanied by the string "top" in logs). This error indicates a failure in communication between the client workstation and the Autodesk Network License Manager (NLM). This paper identifies the root causes—focusing on service disruptions, version mismatches, and firewall blocks—and provides a systematic resolution protocol.
If you are following a standard "Top" guide for Error 85440, you will likely be walked through these stages:
Restart-Service -Name "FlexNet Licensing Service" -Force
Write-Host "Fix applied. Restart your Autodesk product and retry." -ForegroundColor Green
Add a scheduled task on the license server to detect conditions leading to 85440:
# From the affected user's machine
lmutil lmstat -a -c @<LICENSE_SERVER_HOSTNAME> -c @<LICENSE_SERVER_IP>
Expected output should show:
If lmutil is missing, download from Autodesk Network License Manager installer.
Troubleshooting Autodesk License Error [-8.544.0] If you are seeing the "Network License Not Available" error with code 85440, it typically means your computer cannot communicate with the license server. This is often caused by mismatched versions, blocked ports, or an outdated license file. Follow these steps to resolve the issue: 1. Update the License Manager
The most common cause is an outdated Network License Manager (NLM). Get the latest version of You must install this on the hosting the licenses. Compatibility:
Newer software versions (like AutoCAD 2024 or 2025) require the newest NLM to function. 2. Check Firewall & Ports
Your security settings might be blocking the "handshake" between your PC and the server. Open Ports: Ensure ports 27000 to 27009 Inbound/Outbound:
Set rules in Windows Firewall for both the client and server.
Try turning the firewall off briefly to see if the software launches. 3. Verify the License File
If your subscription recently renewed, your old license file is likely invalid. Generate New File: Log into your Autodesk Account and generate a fresh network license file. Combine Files:
If you have multiple products, ensure they are combined into one file correctly. After swapping the file in LMTOOLS, go to the Start/Stop/Reread tab and click Re-read License File 4. Set the System Variable
Sometimes your computer needs a "map" to find the server quickly. Variable Name: ADSKFLEX_LICENSE_FILE @YOUR_SERVER_NAME @YOUR_SERVER_IP
Search "Edit the system environment variables" in Windows and add it under System Variables. Quick Tip:
Ensure your client machine and server are on the same subnet. If you are working from home, make sure your is active and connected to the office network. To help you fix this faster, could you tell me: Are you on a or a local office network? Did this start after a software update server move seeing this error, or just you?
I can provide specific commands or paths based on those details!
Troubleshooting Autodesk Network License Not Available Error 85440: A Comprehensive Guide
Are you experiencing the frustrating "Autodesk Network License Not Available Error 85440" while trying to access your Autodesk software? This error can be a major roadblock, especially when you're in the middle of a critical project. In this article, we'll delve into the causes of this error, provide step-by-step troubleshooting guides, and offer expert advice to help you resolve the issue.
Understanding the Autodesk Network License Not Available Error 85440
The error 85440 is a common issue that occurs when Autodesk software is unable to connect to the network license server. This error message typically appears when you try to launch Autodesk software, and it can be caused by a variety of factors, including:
Causes of the Autodesk Network License Not Available Error 85440
To better understand the root causes of this error, let's take a closer look at the possible causes:
Troubleshooting Steps for Autodesk Network License Not Available Error 85440
To resolve the error 85440, follow these troubleshooting steps:
Step 1: Verify Network Connectivity
Step 2: Check License Server Configuration
Step 3: Configure Firewall Settings
Step 4: Update Software and Licenses
Step 5: Restart License Server and Client
Advanced Troubleshooting Steps
If the above steps do not resolve the issue, try the following advanced troubleshooting steps: autodesk network license not available error 85440 top
Preventing Autodesk Network License Not Available Error 85440
To prevent this error from occurring in the future, follow these best practices:
Conclusion
The Autodesk Network License Not Available Error 85440 can be a frustrating issue, but by understanding its causes and following the troubleshooting steps outlined in this article, you can resolve the issue and get back to work. Remember to regularly update your software and licenses, monitor license server activity, and configure firewall settings to prevent this error from occurring in the future. If you're still experiencing issues, contact Autodesk support for further assistance.
FAQs
Q: What is the Autodesk Network License Not Available Error 85440?
A: The Autodesk Network License Not Available Error 85440 is an error that occurs when Autodesk software is unable to connect to the network license server.
Q: What causes the Autodesk Network License Not Available Error 85440?
A: The error can be caused by network connectivity issues, license server configuration issues, software conflicts, or outdated software or licenses.
Q: How do I resolve the Autodesk Network License Not Available Error 85440?
A: Follow the troubleshooting steps outlined in this article, including verifying network connectivity, checking license server configuration, configuring firewall settings, updating software and licenses, and restarting the license server and client.
Q: How can I prevent the Autodesk Network License Not Available Error 85440?
A: Regularly update software and licenses, monitor license server activity, and configure firewall settings to allow communication between Autodesk software and the license server.
Autodesk Network License Not Available: How to Fix Error The "Network License Not Available - Error" is a common frustration for CAD managers and users relying on Multi-User subscriptions. This error typically triggers when the Autodesk software on your workstation cannot communicate effectively with the Network License Manager (NLM) on your server.
While it looks intimidating, this error is usually caused by simple connectivity gaps, outdated tools, or minor configuration mismatches. Follow this comprehensive guide to troubleshoot and resolve the issue. 1. Verify Your Network Connectivity
The most frequent cause of Error is a break in the "handshake" between your computer and the license server.
Ping the Server: Open Command Prompt and type ping . If you don't get a reply, your network connection is down.
Check the VPN: If you are working remotely, ensure your VPN is active and stable.
IP vs. Hostname: Sometimes DNS fails. Try replacing the server name in your settings with the server's static IP address. 2. Update the Autodesk Network License Manager (LMTOOLS)
Autodesk frequently updates its licensing technology. If your server is running an old version of NLM (LMTOOLS), it may not recognize the license requests from newer software versions (like AutoCAD 2024 or 2025).
Download the latest version: Visit the Autodesk website and download the most recent NLM installer for your OS (Windows, Linux, or macOS).
Check the version: In LMTOOLS, go to the System Settings tab. Ensure your version is 11.18 or higher. 3. Configure Firewall and Port Exceptions
If your server is running but the workstation can't "see" it, a firewall is likely blocking the communication. Autodesk uses specific ports to transmit license data.
Open Port 27000 to 27009: These are used by the Master Daemon (lmgrd.exe).
Open Port 2080: This is the default port for the Autodesk Vendor Daemon (adskflex.exe).
Inbound/Outbound Rules: Add these ports to the "Exceptions" list in both the Windows Firewall and any third-party antivirus software on both the server and the workstation. 4. Set the FLEXLM_TIMEOUT Environment Variable
If your network has high latency or you are on a slow VPN, the software might "give up" waiting for the license server to respond, triggering the 8.544.0 error. Increasing the timeout gives the software more time to connect.
Right-click This PC > Properties > Advanced System Settings. Click Environment Variables. Under System Variables, click New. Variable Name: FLEXLM_TIMEOUT Variable Value: 3000000 (This equals 3 seconds). Restart your Autodesk application. 5. Reset the Local License Cache
Sometimes the local configuration files become corrupted, causing the software to look for the license in the wrong place.
Windows: Navigate to C:\ProgramData\Autodesk\Adlm and C:\Users\.
The Fix: Delete or rename the .dat files or the AdskLicensing folder (Note: Ensure you have your serial numbers backed up before doing this).
Restart the AdskLicensingService: Open Services.msc, find "Autodesk Desktop Licensing Service," right-click it, and select Restart. 6. Check the License File Validity
If the license file on the server has expired or was generated incorrectly, no workstations will be able to pull a seat. Add a scheduled task on the license server
Perform an Inquiry: In LMTOOLS, go to the Server Status tab and click Perform Status Enquiry.
Look for Errors: Check if it says "adskflex: UP" or if it lists "expired" next to your product features.
Generate a New File: If the file is old, log into your Autodesk Account and generate a fresh network license file. Summary Checklist for Error 8.544.0 ✅ LMTOOLS: Is it updated to the latest version? ✅ Ports: Are 2080 and 27000-27009 open?
✅ Server Name: Is the workstation pointing to the correct server? ✅ Timeout: Have you added the FLEXLM_TIMEOUT variable?
If you'd like to dive deeper into a specific area, I can help by:
Providing the direct download link for the latest NLM version.
Walking you through Command Prompt steps to test your ports.
Helping you interpret your LMTOOLS log file to find the exact line of failure. Which of these troubleshooting steps
Incorrect License Type: The user is assigned a "Single-user" (Sign-in) license in the Autodesk Account, but the software is configured to look for a "Multi-user" (Network) license.
Options File Restrictions: If your organization uses an Options file on the server, your specific user account or machine might not be included in the permission list for that product.
Registry Errors: The registry value for ADSKFLEX_LICENSE_FILE might be pointing to an incorrect or non-existent server. Step-by-Step Solutions 1. Reset the License Type (Most Common Fix)
If you are supposed to sign in with your email but the software keeps asking for a server, you must reset the license method: Launch your Autodesk product.
If the error appears, you may need to use the Autodesk Licensing Support Tool to switch the method from Network to User/Sign In.
Alternatively, go to your Autodesk Account and verify that the product is actually assigned to your email address. 2. Update the Autodesk Desktop Licensing Service
An outdated licensing service can cause "handshake" failures between your PC and the license manager:
Open the Autodesk Access app (formerly Autodesk Desktop App).
Check for and install any updates titled Autodesk Desktop Licensing Service or Autodesk Identity Manager.
Restart your computer after the installation is complete to ensure the service refreshes. 3. Verify Server Availability (For True Network Licenses) If your company definitely uses a network server:
Check the Server Status: Ask your IT admin to open LMTOOLS on the server, go to the Server Status tab, and click Perform Status Enquiry to ensure licenses aren't all in use or the service hasn't crashed.
Firewall Settings: Ensure ports 27000 to 27009 and 2080 are open on the server’s firewall to allow communication with your workstation. 4. Fix Folder Permissions
Sometimes the software can't "write" the license activation locally due to permission issues:
"Network License Not Available - Error [-15.29.0 ... - Autodesk
Guide: Troubleshooting Autodesk Network License Not Available Error 85440
Introduction
The "Autodesk Network License Not Available Error 85440" is a common issue faced by users who are trying to activate or use Autodesk software with a network license. This error typically occurs when the software is unable to connect to the license server or retrieve a valid license. In this guide, we will walk you through the possible causes of this error and provide step-by-step troubleshooting steps to resolve it.
Possible Causes of Error 85440
Before we dive into the troubleshooting steps, let's first understand the possible causes of this error:
Troubleshooting Steps
To resolve the "Autodesk Network License Not Available Error 85440", follow these step-by-step troubleshooting steps:
Step 1: Verify License Server Status
Step 2: Check Network Connectivity
Step 3: Configure Firewall and Antivirus Software
Step 4: Verify License Server Configuration # From the affected user's machine lmutil lmstat
Step 5: Check License File
Step 6: Restart License Server and Client Machine
Step 7: Use the LMTools Utility
Step 8: Check Event Logs
Conclusion
The "Autodesk Network License Not Available Error 85440" can be a frustrating issue, but by following these troubleshooting steps, you should be able to resolve it. If you are still experiencing issues, you may want to contact Autodesk support or a qualified IT professional for further assistance.
Additional Tips and Resources
The Autodesk Network License Not Available Error [-8.544.0] typically indicates a communication failure between your software and the network license server, often caused by incorrect license type settings or server-side restrictions. Quick Fixes & Troubleshooting
Verify License Assignment: Ensure you have been assigned the correct license type in your Autodesk Account. If you are assigned a "Named User" license but the software is trying to find a "Network" license, reset the license type on your machine.
Check Server Status: Confirm the Network License Manager (NLM) is running on the server. Use LMTOOLS to perform a "Status Enquiry" and verify that licenses are actually available and not all in use.
Options File Restrictions: If your organization uses an Options file to manage access, ensure your username is included in the INCLUDE list for that specific product.
Update NLM Version: Incompatibility between the client’s licensing service and an outdated server manager can trigger errors. Update the server's Network License Manager to the latest version (v11.18 or newer is often required for 2020+ products). Advanced Repair Steps Reset Licensing Service:
Navigate to C:\Program Files (x86)\Common Files\Autodesk Shared\AdskLicensing. Right-click uninstall.exe and Run as administrator.
Download and reinstall the latest Autodesk Desktop Licensing Service. Enable File Inheritance: Go to C:\ProgramData\Autodesk\Adlm.
Right-click ProductInformation.pit > Properties > Security > Advanced. Click Enable inheritance and apply.
Registry Verification: Check the ADSKFLEX_LICENSE_FILE registry value on the client machine to ensure it points to the correct server. 8" "Error [-8.544.0]" when launching Autodesk software
Ensure the client machine’s date/time/timezone matches the license server (use NTP). A client clock set to a future date can confuse borrow end times.
Document version 1.0 – Last updated: 2026-04-19
Error [-8.544.0] typically occurs when your software successfully contacts the license server but cannot find a valid seat for the product you are trying to launch . This is often due to incorrect license type assignment expired licenses version mismatches between the client and server. Common Causes Wrong License Type
: The user is assigned a "Named User" license but the software is trying to pull a "Network" (multi-user) license. License Expiration : The network license file on the server has expired. Version Incompatibility : The server is running an older version of the Autodesk Network License Manager (LMTOOLS)
that doesn't support the client's version (common for 2020 and newer). Options File Restrictions
: An "options file" on the server might be explicitly excluding the user or computer from using that product. Top Solutions 1. Reset the License Type
If you recently switched to a subscription, your software might still be looking for a network server it no longer needs. Launch your software and select
(Named User) instead of "Network" when the "Let's Get Started" screen appears. If you can't reach that screen, use the Autodesk Licensing Support Tool to reset the license method to "User". 2. Update LMTOOLS on the Server For 2020+ products, your server must run LMTOOLS v11.18 Log into your license server and open Help > About to check the version. If it's older than 11.18, download the latest Network License Manager and reinstall it. IMAGINiT Technologies 3. Refresh the License File
Sometimes the server needs a nudge to recognize its current licenses.
Autodesk Network License Not Available Error [-8.544.0] is a common startup issue typically caused by a mismatch between the assigned license type and the software's configuration. Primary Causes Incorrect License Type
: The user is assigned a specific license (like "Sign In" or "Named User"), but the software is trying to find a "Multi-user" network license on a server. Options File Restrictions : The user or computer might be missing from the list or present in an list within the server's Options file adskflex.opt Registry/Environment Pathing : An incorrect registry value for ADSKFLEX_LICENSE_FILE
can point the software to a non-existent or wrong license server. Graphics Drivers (Specific to Linux)
: In some cases, such as with Maya on Linux, outdated or corrupt graphics card drivers can trigger this specific error code. Top Recommended Solutions Reset the License Type
Since this is often a "Named User" license being treated as "Network," use the Autodesk Licensing Support Tool to change the license method to "User" or "Sign In". Alternatively, reset the license locally by deleting the file or using the AdskLicensingInstHelper tool to change the method. Verify Server Status and Options File Log into the license server and check if the Network License Manager (LMTOOLS) is running. Ensure the user’s name or machine name is added to the statement in the adskflex.opt Repair Licensing Services Uninstall and reinstall the latest Autodesk Desktop Licensing Service to fix potential corruption in the background processes. Check Permissions Navigate to C:\ProgramData\Autodesk\Adlm , right-click on ProductInformation.pit , and ensure that Inheritance is enabled under Security > Advanced. Do you need the specific command-line steps
for the Licensing Support Tool, or would you like a guide on how to configure the Options file? 8" "Error [-8.544.0]" when launching Autodesk software
Review of: "Autodesk Network License Not Available Error 85440"
The Verdict: Highly Accurate and Targeted Troubleshooting
If you are encountering the specific error message "The Autodesk Network License Manager is not available (Error 85440)," the troubleshooting steps provided in top support guides (such as those from Autodesk Knowledge Network or trusted forums) are generally excellent and effective, though they require a moderate level of technical comfort.
Here is a breakdown of why this solution set works and what you need to know before diving in.