This text is missing some spaces, please add them: IfyourPCopenstheBACfile,butit'sthewrongapplication,you'llneedtochangeyourWindowsregistryfileassociationsettings.Inotherwords,WindowsisassociatingBACfileextensionswiththewrongsoftwareprogram.
If your PC opens the BAC file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating BAC file extensions with the wrong software program.
input question: Fix spacing: Howevertheremaybeerrorsand/orinaccuracies.

output answer: However there may be errors and / or inaccuracies.
Problem: CalaSaNauissituatedontheeastcoastofMallorca,closetoPortoColomandCalad'Or.
What's a sentence that uses these characters?
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Cala Sa Nau is situated on the east coast of Mallorca, close to Porto Colom and Cala d'Or.
Add spaces: Alphabeticallistofpublications:"O"|AarhusUniversityPress

Answer: Alphabetical list of publications: "O" | Aarhus University Press
AstangaYogaHelpsYoufindtheBalanceinYourLife

Astanga Yoga Helps You find the Balance in Your Life
Add spaces: TheexactandtruereasonforhavingOCDisyettobeestablished.

Answer:
The exact and true reason for having OCD is yet to be established.