acor_is-IS.dat is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like acor_is-IS.dat, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like MpSigStub.exe - to follow. These files were created so that multiple programs (eg. LibreOffice) could share the same acor_is-IS.dat file, saving valuable memory allocation, therefore making your computer run more efficiently.
Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared DAT file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when acor_is-IS.dat is attempted to be loaded either when LibreOffice is starting up, or in some cases already running. Some of the most common acor_is-IS.dat errors include:
- Access Violation at address - acor_is-IS.dat.
- acor_is-IS.dat could not be found.
- Cannot find C:\Program Files\LibreOffice\share\autocorr\acor_is-IS.dat.
- Cannot register acor_is-IS.dat.
- Cannot start LibreOffice. A required component is missing: acor_is-IS.dat. Please install LibreOffice again.
- Failed to load acor_is-IS.dat.
- The application has failed to start because acor_is-IS.dat was not found.
- The file acor_is-IS.dat is missing or corrupt.
- This application failed to start because acor_is-IS.dat was not found. Re-installing the application may fix this problem.
Your acor_is-IS.dat file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with LibreOffice), or deleted by a malware infection. Furthermore, acor_is-IS.dat file corruption could be caused from a power outage when loading LibreOffice, system crash while loading acor_is-IS.dat, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.