What are some common causes of an 'unsupported or unrecognized format' error?

Common causes include: 1) File corruption during transfer or storage. 2) Attempting to open a file with the wrong program. 3) Using a file format that the application doesn't support. 4) A software bug in the application's parsing logic. 5) An outdated version of the application attempting to process a newer file format. 6) Incorrectly configured data encoding or character set.