Printing errors solved by Windows update KB5001649

19 Mar 2021

The Windows security update KB5000802 and Windows Quality update KB001567 caused printing errors in both FlexMail and FlexStream.

On 19-March-2021 Microsoft released a new Quality update KB5001649 that solves the issues caused by the earlier updates. We have tested this update and can confirm that the problems encountered in FlexMail and FlexStream are fixed.

To install the update:

  • Go to Settings > Update & Security > Windows Update. In the Optional updates available area, you’ll find the link to download and install the update.
- or -
  • To get the standalone package for this update, go to the Microsoft Update Catalog and download and install the update for your Windows version.
Windows update KB5000802 causing print issues

17 Mar 2021
On 9-March-2021 Microsoft released an update for Windows 10 (KB5000802). Microsoft acknowleges an error in this update that might cause a crash when attempting to print to certain printers in some apps. The update can also effect apps in other unexpected ways.

The update impacts FlexMail and FlexStream in such a way that barcodes and scancodes are not printed when printing directly to certain printers.

On 15-March Microsoft released an additional update (KB5001567) to fix the issues. We have tested the fix and unfortunately the new update does not resolve the problems we have seen in FlexMail and FlexStream.

We have reported the continuous problem to Microsoft and are working with them to further investigate and resolve the issue. For now, if you are experiencing problems in our software, we recommend that you uninstall update KB5000802. If you have also installed KB5001567 you need to uninstall that update first. You do so by doing the following:

  1. Press Win+I to open the Settings app.
  2. Choose Update and Security.
  3. Click the View Update History link.
  4. Click the Uninstall Updates link.
  5. Choose the update you want to remove.
  6. Click the Uninstall button that appears on the toolbar.

After uninstalling the update(s), FlexMail and FlexStream should work correctly as before.

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