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When the Servoy Application Server will not start, there are two likely reasons for it:

- Is the database containing the Servoy Repository running? Note that the Servoy Application Server doesn't start a database, not even the bundled PostgreSQL database.

- Does the application Server fail to start after disabling or updating the SSL settings? The passwords of the database connectiosn defined of the server and stored in the servoy.properties file are encrypted using the SSL settings. due to the update to the SSL settings, the passwords cannot be decrypted anymore. Remedy: manually reset the passwords in the servoy.properties file

If the above mentioned items are not the the reason for the Servoy Application Server not starting, the next step would be to analyse the log files:

* ../application_server/servoy_log.txt

*  

h6. Network errors

Some Java environments start with IPv6 Stack. If this happens, while actually running IPv4, the result might be network errors. In order to prevent errors, the Servoy Application Server can be started with a preference to use the IPv4 Stack.

- Open servoy_server.sh/servoy_server.bat in the <servoy>/application_server/ directory using a text editor

- Add '-Djava.net.preferIPv4Stack=true' to the end of the line that starts with 'java'

- Save the change made

- \[S50SDG:Re\]start the Servoy Application Server

h6. Server

 crashes


h5.

The Servoy Application Server is very robust and is known for its stability and extreme long uptime. In the unlikely event of a crash, this is most likely caused by an out of memory exception, caused by 

h3. Servoy Smart Client

When experiencing problems with Smart Client starting or loosing connections, the following items might offer resolution. At any time, more information can be retrieved by enabling the Java WebStart console on the client machine prior to launching the Smart Client. This will open an additional console on the client machine with a client-side log. The Java WebStart console can be enabled in the _Java Control Panel > Advanced > Java Console_ by checking the _Show console_ option


h6. Error: cannot find dataservice, it may not be running on server

This error is displayed in the Servoy Smart Client when it can't properly connect to the Servoy Application Server at startup. Most likely cause of this message is incorrect configuration of the Network Settings in combination with firewalls and proxies

h6. Error: Connection to Servoy server is invalid

Invalid SSL Certificate or using a self-signed certificate, which is not supported for Smart Clients

h6. Microsoft JScript compilation error: syntax error (Windows only)

!WS JScript.png|align=center! {float:left}When during launching the Smart Client a _Syntax error_ dialog pops up with the title _Microsoft JScript compilation error_, this means that on the client machine Java WebStart is configured to look at the browser for the Proxy settings. On Windows this means that it is looking at the _Local Area Network (LAN) Settings_ under _Connections_ of _Internet Properties_. Where these setting are located differs per Windows version, but they can usually be accessed through the (advanced) network settings of a browser. 

The solution is to either configure Java WebStart to use "Direct connection" (Not to be confused with Servoy's Direct Connection mode) or to uncheck all options in the _LAN Settings_ of Windows. As both options are system-wide settings they can influence other applications.{float}

Q: IS THIS ONLY RELEVANT WHEN USING TWO-WAY SOCKET, OR ALWAY, ALSO WHEN USING THE TUNNEL?

h6. Proxy Settings in Java Webstart, causing fallback to Direct Connection, for which requirements aren't met


h6. JNLP gets downloaded as file

h6. Plugin or bean not loading in the Client

If one specific plugin or bean doesn't seem to load in the Client, check the server log around the time when the Servoy Application Server got started. At server startup, all the plugins and beans are loaded. If there is an issue with the plugin or bean, it will be excluded from the list of plugins and beans send to the client. Any issue with the plugin or bean would result in errors in the server log when the server gets started.

You can review the list of plugins that are send to the client by adding "?raw=true" to the url of the Smart Client ([http://domain:post/servoy-client/solutionName.jnlp]) and then viewing the content of the JNLP file by looking at the source code of the page in the browser.

h3.

 Other


h6. Oracle: Servoy doesn't see the tables in the database

Most likely cause is the 'Schema' property for the connection. This property must be set to the appropriate 'Schema' in the Oracle database. The value for the 'Schema' property must be all uppercase.