Seaquel
SQLite error code

SQLITE_NOTADB

SQLITE_NOTADB is SQLite result code 26.

Result code26
NameSQLITE_NOTADB
Primary codeSQLITE_NOTADB

What it means

When attempting to open a file, the SQLITE_NOTADB error indicates that the file being opened does not appear to be an SQLite database file.

Source: SQLite Result and Error Codes