It sounds like the app is looking for bi-directional feedback that it is not getting from the printer in the configuration. That is why the label prints anyway, because it just pushes out the print job. The delay may be a network traffic issue.

Answer from Repairatrooper on community.spiceworks.com
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ShipScience
shipscience.com › troubleshooting-printer-not-ready-error-in-ups-worldship
Troubleshooting ‘Printer Not Ready’ Error In UPS Worldship - ShipScience
September 27, 2024 - The ‘Printer Not Ready’ error in UPS Worldship indicates a communication breakdown between the software and the connected printer. This malfunction can prevent the printing of shipping labels and important documents, directly impacting business ...
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ShipScience
shipscience.com › troubleshooting-printer-not-ready-error-in-ups-worldship-3b468
Troubleshooting 'Printer Not Ready' Error In UPS Worldship - ShipScience
September 27, 2024 - One common reason for the 'Printer Not Ready' error is outdated printer drivers. It is important to regularly update the printer drivers to ensure that the printer is functioning properly and is compatible with the UPS Worldship software.
Discussions

Printer is not ready. The klippy host software is attempting to connect Error
Confirm that the printer is flashed. You should see dots on the original printer screen. If dots show up then make sure that you have the printer on USB 1, which is the top left port. More on reddit.com
🌐 r/CrealitySonicPad
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January 6, 2023
Trying to get a thermal printer to work with UPS Worldship 2018

You might have to install the printer as a zp450. I have had issues with ups worldship in the past when trying to use an "unsupported" printer that was identical to another zebra that they do support. I had to install it to the computer as if it were the supported one then it worked perfectly fine.

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🌐 r/techsupport
15
2
May 10, 2018
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UPS
ups.com › worldshiphelp › WSA › ENU › AppHelp › mergedProjects › CORE › TOOLS › Set_Printing_Setup_System_Preferences.htm
Set Printing Setup System Preferences
On the Tools tab, select System Preferences and then Printing Setup. The Printing Setup tab in the System Preferences Editor window appears. The Printer grid at the top of this tab shows all printers currently set up.
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ShipScience
shipscience.com › troubleshooting-how-to-resolve-the-issue-when-ups-worldship-cannot-find-a-label-printer-3-8edbb
Troubleshooting: How to Resolve the Issue When UPS Worldship Cannot Find a Label Printer - ShipScience - Helping Businesses Ship Smarter
Establish a Backup Plan: Having a secondary printer or alternative printing method ready can keep your operations running smoothly in case of primary printer failures. Train Staff: Ensure that team members are knowledgeable about basic troubleshooting steps and maintenance routines to quickly address minor issues. Maintaining a reliable label printing system with UPS WorldShip ensures efficient shipping operations and enhances overall business productivity.
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UPS
ups.com › assets › resources › webcontent › en_US › ThermalLabelInstall.pdf pdf
Thermal Label Printer Guide Installing and troubleshooting thermal
Tip: The printer must be connected and turned on. ... Support Utility. The User Diagnostic Support ... Selection window appears. ... Note: If the new printer is not shown, click Cancel.
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ShipScience
shipscience.com › how-to-fix-an-ups-worldship-print-error-3
How to Fix an UPS Worldship Print Error - ShipScience - Helping Businesses Ship Smarter
Navigate to the Preferences tab in UPS Worldship. Access the Printing section. Click the Test Print button to verify printer detection.
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UPS
ups.com › us › en › business-solutions › business-shipping-tools › worldship › worldship-support
WorldShip Support | UPS - United States
... Within WorldShip, navigate to the Printing Setup menu within the System Preferences Editor in WorldShip and correct the current thermal label printer settings (System Preferences Editor > Printing Setup).
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ShipScience
shipscience.com › troubleshooting-issues-with-ups-worldship-not-printing-documents
Troubleshooting Issues with UPS Worldship Not Printing Documents - ShipScience - Helping Businesses Ship Smarter
May 30, 2023 - Always verify that your packages comply with UPS shipping requirements before attempting to print labels. Diagnosing printing problems with WorldShip involves systematic troubleshooting to identify the specific issue. Start by determining the type of print job that is failing. For example, if shipping labels print correctly but invoices do not, the issue might reside in the printer settings or software configuration.
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ShipScience
shipscience.com › troubleshooting-an-invalid-label-printer-in-ups-worldship
Troubleshooting an Invalid Label Printer in UPS Worldship - ShipScience - Helping Businesses Ship Smarter
Go to the printer settings in UPS Worldship. Select the option to reset the printing system. Re-add and configure your printer following the setup prompts. Note that this action will remove all existing printer configurations, so ensure you have necessary information before proceeding.
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ShipScience
shipscience.com › how-to-set-up-ups-worldship-printer-for-end-of-day-5
How to Set Up UPS Worldship Printer for End of Day - ShipScience - Helping Businesses Ship Smarter
Printer Not Recognized: Reinstall printer drivers and check USB connections. Driver Conflicts: Ensure no conflicting drivers are installed; remove any unnecessary ones. Incorrect Label Formatting: Revisit printer settings in Worldship to adjust label size and layout.
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UPS
ups.com › assets › resources › webcontent › en_GB › TroubleshootThermalPrinter.pdf pdf
© Copyright 2014, United Parcel Service of America, Inc. All rights reserved.
WorldShip® · Troubleshoot the Thermal Label Printer · For Zebra ZP450 models only: To enter/exit Dump Mode:  · Turn the printer off using the power · switch on the back of the printer.  · Press and hold the Feed button while · turning the printer back on.
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ShipScience
shipscience.com › troubleshooting-issues-with-ups-worldship-shipment-doc-not-printing-2
Troubleshooting Issues with UPS WorldShip Shipment Doc Not Printing - ShipScience - Helping Businesses Ship Smarter
Printer Hardware Problems: Insufficient ink or toner levels, paper jams, and misaligned paper trays can all hinder the printing process. Software Conflicts: Conflicts between UPS WorldShip and other software applications on your computer may result in printing failures.
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Reddit
reddit.com › r/techsupport › problems with ups worldship and thermal printer
r/techsupport on Reddit: Problems with UPS Worldship and Thermal Printer
April 14, 2011 -

I am trying to get UPS Worldship (software used to print barcodes on Thermal Printers for sending packages, for a company) to connect with a Zebra Thermal Printer (model 2844). I have installed UPS Worldship, and what I believe to be the correct drivers. I know the printer is working because it prints when connected to other machines with the same software/setup. However, for some reason when I hit print the Windows 7 Printer icon says Printer task: Error Printing. Do you have any ideas? I am thinking of uninstalling all of the software and drivers and starting again, other than that I do not have any ideas.

Thanks!

Adi

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ShipScience
shipscience.com › troubleshooting-tips-for-not-being-able-to-print-a-label-with-ups-worldship
Troubleshooting Tips for Not Being Able to Print a Label with UPS Worldship - ShipScience - Helping Businesses Ship Smarter
The printer is powered on and in a ready state to receive print jobs. There are no loose or damaged cables that could disrupt the connection. If you're using a network printer, ensure that your computer is properly connected to the same network and that the printer is accessible over the network. Running a test print from another application can help determine if the issue is specific to UPS Worldship ...
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UPS
ups.com › assets › resources › media › en_US › ThermalLabelInstall.pdf pdf
Ups
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