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SQLite error code

SQLITE_IOERR_READ

SQLITE_IOERR_READ is SQLite result code 266, an extended code of SQLITE_IOERR.

Result code266
NameSQLITE_IOERR_READ
Primary codeSQLITE_IOERR

What it means

The SQLITE_IOERR_READ error code is an extended error code for SQLITE_IOERR indicating an I/O error in the VFS layer while trying to read from a file on disk. This error might result from a hardware malfunction or because a filesystem became unmounted while the file was open.

Source: SQLite Result and Error Codes