# Calc document has changed into Writer document. How can this happen?

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Thanks, Mike. Is this sort of think a rare occurrence, do you know?

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The question is not answerable properly, actually.

If the event was something entirely random (like some radiation from space changing bits in memory, or a power surge), then yes, it's something happening not too often (but power surges may be not uncommon in some areas). But it could happen that the problem is caused by some actual problem, like full drive; or not enough memory; or some bug in program not liking some combination of content or output format ... and then me calling something "rare" would be misleading, because for this specific document or system it could be not so.

So it's not correct to try to guess how rare this could be; instead, use proper backup of your important files, including creating backups when saving in LibreOffice (see OptionsLoad/SaveGeneral, Always create backup copy option).

( 2019-01-11 19:11:44 +0200 )edit

Thanks for the answer and for the information on using "comment" rather than "answer". Hope I've got it right this time!

( 2019-01-11 19:31:39 +0200 )edit

This can happen if the problem during saving was so severe that the file got completely corrupt. LibreOffice does not rely on file extension to select component used to open the file; it checks the internal file structure and then decides. So in case of severely damaged (possibly completely empty?) file, it cannot detect anything more suitable than "generic text document", and opens Writer accordingly.

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