A new Windows security update appears to affect printing from BarTender.

After installing the August 9 updates, some users have reported that BarTender will print 2–3 jobs successfully but will exhibit errors when it tries to print more.

The BarTender development team is working directly with Microsoft to investigate this issue and find a resolution.

If you use BarTender in a production environment, be aware that installing the August 9 Windows updates may affect your ability to print reliably. Please assess your security needs carefully before deciding whether to uninstall or delay installing these updates.

If you have already installed the Windows updates, there are currently two workarounds for this issue.

These are detailed at the BarTender Support Center:

https://support.seagullscientific.com/hc/en-us/articles/225047808

The above link will always have the very latest information on this issue, including any new workarounds and the final resolution. Seagull Scientific  are committed to solving this issue as quickly as possible.