Print Monitoring Solutions News.

New Article: How to Open SPL Files

We have published a new article explaining how to open and analyze SPL printer spool files created by the Windows print spooler.

The guide explains what SPL files are, where they are stored in Windows and how to view their contents using a dedicated printer spool file viewer.

Read the article: How to Open SPL Files

Released O&K Print Watch 4.19.0.5257

• Improved subscription licensing model:
• Flexible scalability for organizations of any size.
• Simplified license management.
• Improved performance.
• Removed database query limitations for subscription licenses.


• Full support for TSPL (TSC Printer Language) added:
• Print monitoring for TSC barcode and label printers
• Page counting for TSPL documents
• Print job content preview
• Integration with the existing reporting system


• Web interface improvements:
• Report filters are saved in cookies
• Period and filter parameters are preserved between sessions
• Improved user experience in the web interface


• Server improvements and fixes:
• Optimized PDF copy generation of printed documents (reduced database load)
• Fixed calculation of the “Every Month” report delivery period
• Fixed database upgrade error
• Fixed user print quota deletion issue
• Fixed MSI service removal issue
• Fixed license verification issue when using remote mailslots

Released O&K Print Watch Linux 1.0.0.164

New email reporting module:

• Notifications for every printed document.
• Periodic reports on all printed documents for a specified time interval.
• Summary and detailed print history reports (by printers, users, and groups).
• Reports on current device counter readings.
• Automatic alerts when consumable levels drop to 50%, 20%, 10%, and 1%.
• Support for flexible report scheduling.

Additional improvements:

• Added SMTP timeout setting for reliable integration with any mail server.
• Report templates and localization files are now stored in: /opt/printwatch/templates and /opt/printwatch/locales
• Summary and detailed print history reports (by printers, users, and groups).
• Reports on current device counter readings.
• Automatic alerts when consumable levels drop to 50%, 20%, 10%, and 1%.
• Overall system stability improved; various bugs fixed.

Printing Pages of Different Sizes on Different Printers with O&K Print Router

How to print documents that contain pages of different sizes.

Released O&K Print Watch 4.19.0.5236

• Duplicate Email Notifications Fixed: the logic for sending reports on device status changes and consumable level changes has been corrected—duplicate emails will no longer be sent.


• Instant Report Sending from Web Interface: added a “Send Now” button for on-demand distribution of the current status directly from the control panel.


• Expanded SNMP Monitoring:
  • Canon MF4800 Series
  • Canon iR2520
  • HP LaserJet Professional M1212nf MFP
  • Full integration with Pantum printers


• Proper UTF-8 Handling: fixed errors in email report generation—any Unicode characters are now validated and correctly displayed.


• Document Name Conversion Optimization: resolved the issue with truncated print job names for certain PCL drivers—document names now appear in full.


• Web Interface Improvements: visual and functional bugs have been fixed, improving page load speed and overall stability.


• General Fixes and Optimizations: minor bug fixes from the previous version have been implemented for even more reliable system performance.

Released O&K Print Watch Linux 1.0.0.134

• Added support for systems with glibc 2.16.
• Fixed an issue with automatic addition of all printers during the first installation on Linux systems using RPM packages.
• Implemented automatic database cleanup based on specified parameters.
• Optimized reading of settings from the database.
• Fixed date range selection issue in the web interface.
• Added a database information panel to the web interface.
• Enabled deletion of document records and their contents from the database via the web interface.
• General bug fixes and stability improvements.

Released O&K Print Watch 4.19.0.5226

13 May 2025 O&K Print Watch 4.19.0.5226.

• Improved conversion of PCL, PCLXL, and XPS documents to PDF.
• Fixed an issue with removing a computer from a group.
• Added a counter for selected printers in the device add/remove dialog.
• Fixed date range selection issue in the web interface.
• Added a database information panel to the web interface.
• Enabled deletion of document records and their contents from the database via the web interface.
• General bug fixes and stability improvements.

Released O&K Print Watch Linux 1.0.0.124

16 Feb 2025 O&K Print Watch Linux 1.0.0.124.

• Added the ability to group computers for management and reporting.
• Fixed the error of launching the print monitor in some Linux versions
• Fixed an error with initialization of the license by the number of PCs.
• Fixed some errors.

Released O&K Print Watch 4.19.0.5213

6 Feb 2025 O&K Print Watch 4.19.0.5213.

• Fixed bug with getting URL for pooling if no remote server is specified.
• Fixed errors with menu display in the web interface.
• Fixed bug： Cannot view the contents of printed documents when connected via RDP to O&K Print Watch management program.
• Fixed bug： PDFs of printed documents are not created when installing O&K Print Watch Service via MSI package.
• Fixed error with license display in web interface.
• Fixed a bug with deleting license by number of PCs from
the database.
• Fixed some bugs.