Error 7502 - Cadworx Splm

Essay: Troubleshooting CADWorx SPLM Error 7502

Introduction
CADWorx and its associated SPLM (SmartPlant License Manager / Siemens PLM-like licensing middleware) integrate complex licensing and configuration systems to support plant design workflows. Error 7502 is a common runtime/licensing fault reported by users during CADWorx startup or when attempting to access specific modules. This essay examines probable causes, diagnostic approaches, and practical remediation steps to resolve Error 7502, balancing technical detail with actionable guidance.

Step-by-Step Troubleshooting

When faced with Error 7502, resist the urge to reinstall CADWorx immediately. Instead, follow this logical sequence:

Step 1: Check the Basics (Client-Side)

• Ping the Server: Open a command prompt and type ping [ServerName] or ping [ServerIP]. If you get no reply, it’s a network issue. Check cables, Wi-Fi, or VPN connection.
• Verify Server Address in SPLM Client: On your local machine, open the SPLM Client (from the Start Menu). Go to the Configuration tab. Ensure the server name or IP listed is correct. If it’s wrong, correct it and apply.

Step 2: Inspect Firewall and Antivirus

• Both Windows Defender and third-party security software can block SPLM’s communication. Temporarily disable the firewall (just for a test) to see if the error resolves. If it does, create an exception for the SPLM ports (typically TCP port 27000-27009 and the vendor-specific port defined in your license file).

Step 3: Verify the License Server is Operational

• On the server machine, open Services.msc and locate the SPLM License Manager service. Ensure its status is “Running.” If not, start it.
• Open the SPLM Server Admin tool and check the license log file. Look for recent errors or indications that the license file is missing or invalid.

Step 4: Restart Everything (The Universal Fix)

• Restart the SPLM service on the server.
• Restart the CADWorx client machine.
• Often, a simple restart clears transient network or service hangs.

Step 5: Advanced Checks (If All Else Fails) cadworx splm error 7502

• Check for Multiple Network Adapters: If your workstation has both Ethernet and Wi-Fi active, disable one. SPLM can get confused.
• Verify Date and Time: Incorrect system time (especially on the client) can cause secure handshake failures. Synchronize both server and client with a reliable time source.

4.1 IPv4 vs. IPv6 Protocol Mismatch

This is the most prevalent cause in modern Windows environments. Modern Windows operating systems default to prioritizing IPv6. However, SPLM legacy configurations often bind strictly to IPv4 addresses.

• The Failure: If the client attempts to contact the server via an IPv6 loopback or address, and the SPLM service is listening on IPv4 only (or vice-versa), the connection fails, resulting in Error 7502.
• The Evidence: This often occurs after a Windows Update that resets network adapter precedence.

Example Troubleshooting Timeline (concise)

1. 0–15 min: Check logs and ping license server.
2. 15–45 min: Test port connectivity, review license file, restart license manager service.
3. 45–90 min: Verify versions, adjust environment variables, check firewall.
4. 90–180 min: Escalate to vendor with gathered logs, timestamps, and server/client environment details.

Primary Causes

To solve the problem, one must first identify the likely culprit. Error 7502 usually stems from one of three areas:

1. Network Connectivity Issues: The workstation cannot see the license server. This could be due to a physical cable disconnect, a VPN failure (if working remotely), a firewall blocking the SPLM ports, or incorrect DNS settings.
2. SPLM Service Problems: The SPLM service on the server itself may have stopped, crashed, or failed to start properly. Alternatively, the license file may have been moved or corrupted.
3. Client-Side Configuration Errors: The CADWorx installation on the user’s machine may be looking for the license server at the wrong IP address or hostname. This often occurs after a server IP change or a network reconfiguration.

Still Getting Error 7502?

Try this quick workaround:

• Launch CADWorx as Administrator (right-click > Run as Admin)
• Set your system date back 1 day (temporarily) to bypass expired token caches

If none of the above works, contact Hexagon Support with your debug.log file (found in %temp%\SPLEM_logs). Tell them you’ve already tried steps 1-5—they’ll appreciate it.

2. Check system date and time

• Ensure your PC’s date/time are correct.
• If the clock was changed after borrowing, the license may become invalid.

Common causes for error 7502:

• Attempting to borrow a license that has already expired or is not available.
• Clock/time mismatch between the client machine and the license server (or borrowed license period).
• Corrupt SPLM borrowing data on the local machine.
• Trying to run CADWorx offline without a valid borrowed license.
• SPLM version incompatibility between client and server.

6. Registry Cleanup (Advanced)

Backup your registry first. Delete any leftover CADWorx license keys under: HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\SPLEM

Then reconfigure the license path from scratch. Ping the Server: Open a command prompt and