45 134 Added By Users Install — Heidelberg Prinect Prepress Interface
After the installer finishes, the interface files exist, but the registry keys for network listeners may not be configured. This is where the "added by users" part becomes critical.
Manually add the following DWORD to the registry:
HKLM\SOFTWARE\Heidelberg\Prinect\PrepressInterface\Parameters\UseLegacySocket45 = 1
This forces the interface to listen on Port 45 (Legacy) and Port 134 (Optimized JDF).
Open Services.msc. Stop the following services in order:
Failure to stop these services before an "added by users install" will result in a "Files in use" lock error. After the installer finishes, the interface files exist,
The "Heidelberg Prinect Prepress Interface" acts as a digital bridge. It takes the data generated during prepress and sends it directly to the printing press console.
The specific iteration labeled "45 134" represents a robust update added by users and technicians to modernize connectivity. In the ecosystem of Heidelberg machinery, software versions are critical. This specific build is noted for its enhanced compatibility with newer operating systems and its ability to integrate older press models into modern workflows.
When a shop installs the "45 134" interface, they are effectively retrofitting intelligence into their hardware. The interface automates the presetting of the press. It tells the machine exactly how much ink is needed for each zone of the plate, the exact sheet size, the gripper margins, and even the register settings.
Users are specifically hunting for version 45.134 because: Failure to stop these services before an "added
Cause: The Windows Installer cache is corrupted or a previous version (44.x) is lingering.
Fix: Use Microsoft's msizap.exe to remove the old product code, then re-attempt the install.
Because this is an unofficial install, you will encounter unique errors. Here is how the community resolves them:
| Error Message | Likely Cause | User-Added Fix |
| :--- | :--- | :--- |
| "License for 45 134 not found" | The override key is in the wrong location. | Ensure the .key file is in ProgramData, not Program Files. |
| "DLL version mismatch (Expected 45, got 44)" | Another interface (e.g., Delta 44) is conflicting. | Disable the conflicting interface in PrepressInterfaceConfig.xml. |
| "JMF Port 8081 blocked" | Windows Firewall or another app (like Skype) owns the port. | Run net stop http and then netsh http delete urlacl url=http://+:8081/ |
| "Prepress Interface crashes on PDF input" | The user-added 134 patch expects a specific PDF version. | Re-save your PDF as PDF/X-1a:2001 before sending to the hotfolder. |
An administrator manually added the interface module to support a specific press connection (e.g., a non-Heidelberg press or a legacy CPC console) that wasn't included in the default "Typical Installation." the exact sheet size
The Heidelberg Prinect Prepress Interface 45.134 is more than just a software version; it is a lifeline for legacy prepress departments demanding stability. While the "added by users install" process requires registry edits and command-line finesse, the result is a robust, unbreakable bridge between your job management software and your platesetter.
By following the manual installation steps outlined above—stopping services, running MSIExec with logs, and applying the post-install registry tweaks—you can bypass the headaches of automatic updates and gain full control over your prepress pipeline.
Have you performed this install? Share your experience with the "UseLegacySocket45" key in the comments below. For official support, always reference Heidelberg’s technical documentation for Prinect Version 45.134 SP1.
Disclaimer: This guide is based on user-contributed workflows and standard Windows administration practices. Always consult Heidelberg’s official support before modifying production systems.