When you run ".open test.db" if the database doesn't already exist, then the 
file is created. However *no data is written yet* as there are a few permanent 
things you could change at the very start (like page size, encoding, etc), so 
it holds off on writing the first page with the header until you issue some 
sort of statement that isn't setting those "new database options" So since the 
file is still 0 size at this point, there is no header for .dbinfo to read 
from. If you create a table first for example, then it will populate the header 
and actually write to the file, at which point there will be a header for 
.dbinfo to read.


-----Original Message-----
From: sqlite-users <sqlite-users-boun...@mailinglists.sqlite.org> On Behalf Of 
Alexander Gabriel
Sent: Friday, August 30, 2019 10:54 AM
To: sqlite-users@mailinglists.sqlite.org
Subject: [sqlite] error: unable to read database header

Hi

I downloaded the files for v3.29.0 into a folder.
Then double clicked sqlite3.exe to open a command shell.
Then typed `.open test.db`
Then typed `.dbinfo`
And got: `unable to read database header`

What am I doing wrong?
Have I created a broken database?

Alex
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