Even if you only append rows, you are in trouble when you happen to copy the database in the middle of a transaction, whether it is implicit or explicit. Any insert, update or delete may affect more than one database page. Rows are kept in a [BTree structure](https://www.sqlite.org/fileformat2.html#b_tree_pages), stored in pages. Any modification will change a leaf page, some modifications will also change interior pages. By copying in the middle of a transaction, you break the [atomicity](https://www.sqlite.org/atomiccommit.html) of the commit process. You may copy pages with states before and after modification. So, the resulting copy may be corrupt. ``` -- Regards, Kees Nuyt ```