Invalid zip file created with ZipFileEncoder about archive HOT 4 OPEN

I'm not entirely sure what the problem might be. The one bit that I would investigate is _generateItemArchive is marked as async, and the full function doesn't seem to be shown here, so is there something actually asynchronous about it? Maybe use an await when calling it?

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I tried _generateItemArchive to call as await but got an error as following:
The await expression can only be used in an asynchronous function.
Try marking the function body with either 'async' or 'async*'.dart(await_in_wrong_context) - the method already as aync. _generateItemArchive is async as it uses Sqflite package for SQLite.

Problem is not _generateItemArchive, I tried with only encoder.addFile(File('${documentsDirectory.path}/TestDB.db')); with same result as invalid zip file for test purpose.

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Ok, throws out that theory :-). You said there's an exception thrown from encoder.close(). What exception is that?

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I think I found a clue, let me dig more and provide you details. You are right about the problem is in the async method. As my app data flow has changed a little bit I have to create one more level for an item to get its photo.

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