Embedded Font PXQBAE+DIN-Bold

Hi,
trying to open a pdf but getting the following error message "Cannot extract the embedded font PXQBAE+DIN-Bold. Some character may not display or print correctly"
Operating System: Windows 10 Pro 64-bit
Adobe Acrobat Reader DC 17.012.20098
I have downloaded and installed the 8 DIN font types, rebooted but still get the same error.
Any help would be appreciated.