Thanks Michal,

I'm using MS SQL Server (2008 Express).

My sync.properties file:
======================
DB_ENGINE = mssql
DBURL = jdbc:sqlserver:// xxxxxx.ddns.net:1433;DatabaseName= xxxxxx
DBUSER = xxxxxx
DBPASS = xxxxxx
DBDRIVER = com.microsoft.sqlserver.jdbc.SQLServerDriver
DATE_FORMAT = dd-MM-yyyy HH:mm:ss
HISTORY_DAYS = 7
LOG_LEVEL = 4


My web.xml file
======================
......
<env-entry>
     <env-entry-name>working-dir</env-entry-name>
     <env-entry-type>java.lang.String</env-entry-type>
     <env-entry-value> /opt/tomcat/webapps/SqliteSync_315/logtempconfig</env-entry-value>
</env-entry>


logtempconfig folder was created by me.

The subfolder config where I put the sync.properties inside to
/opt/tomcat/webapps/SqliteSync_315/logtempconfig/ config
/opt/tomcat/webapps/SqliteSync_315/logtempconfig / config /sync.properties

I also run
sudo chgrp tomcat /opt/tomcat/webapps/SqliteSync_315/logtempconfig
sudo chmod g+rw /opt/tomcat/webapps/SqliteSync_315/logtempconfig

I have installed tomcat 8 in the digitalocean.com server following this tutorial:


Still having the same problem:

API[3.1.5] SQLite-Sync.COM is working correctly! Error creating database connection.