Microsoft had previously broken printing for some printers in their March 10th 2021 Update KB5000802 for Windows 10. Also affects Windows 7 and Server OSes, see further down.
This could have affected SpecView as either trend chart plot areas not printing, or SpecView crashing completely.
Microsoft have now released a fix for this on March 18th, it’s called KB5001649 and it should be installed next time you run Windows Update, but if not, here is how to check:
Full Microsoft details are here:
-------------------------- Windows 7 ------------------------------------
See an article here (but it is full of adverts):
However, it says:
The out-of-band updates are already available for manual download from the Microsoft Update Catalog.
Here is the list of special updates for the different Windows versions:
KB5001639 for Windows 7 SP1 and Windows Server 2008 R2: Microsoft Update Catalog
And you can go directly to Microsoft's website here:
https://www.catalog.update.microsoft.com/Search.aspx?q=kb5001639
-------------------------- Windows Server 2012 ---------------------------
We've also been informed of a similar issue in Windows Server 2012 in updates numbered: KB5000848 and KB5000800.
And similarly Microsoft have issued a fix in update numbered: KB5001640
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