Error code
SQL Server 53
SQL SERVER53
Database Error Code· An error code returned by a database server such as PostgreSQL or MySQL.
What it means
a network path was not found — the client could not reach the server.
How to fix it
- Verify the server hostname or IP address in the connection string.
- Confirm that the SQL Server instance is running and its port (default 1433) is reachable from the client.
- Check firewall and security group rules to ensure TCP port 1433 is open between client and server.
Not affiliated with SQL Server. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More SQL Server codes
- 10054an existing connection was forcibly closed by the remote host — network reset
- 102incorrect syntax near — the parser encountered an unexpected token
- 1105could not allocate space for object — the filegroup or disk is full
- 1205transaction was deadlocked and chosen as the deadlock victim — rolled back
- 156incorrect syntax near a keyword — a reserved word was used improperly
- 17142SQL Server service is paused — new connections are refused
- 18456login failed for user — authentication rejected
- 207invalid column name — the column does not exist on the referenced table
- 208invalid object name — the table or view does not exist
- 229execute permission denied on object — the user lacks the required privilege
- 233no process is on the other end of the pipe — connection broken
- 245conversion failed when converting to a data type — type mismatch