[sumo-user] No statistical output file while using Traci

[Thodoris Zerlentis <zerlentis@xxxxxxxx>]

Greeting everyone,
I am using traci commands through a python script in order to run some simulations. My sumo version is 1.2.0. The problem is that after simulation ends with the command traci.close() i get a non fully written statistical output file. I only get the coming lines:

***Starting server on port 42389 ***

Loading net-file from '../../../../.net.xml'... done (13ms).

Loading additional-files from '../../../../.add.xml'... done (12ms).

Loading done.

Simulation version 1.2.0 started with time: 0.00 

In the error log i get Error: tcpip::Socket::recvAndCheck @ recv: peer shutdownQuitting (on error).

The strange thing is that if i run the exact same script but using the sumo-gui the output files are fully writen.

My configuration file:
<?xml version="1.0" encoding="iso-8859-1"?>

<configuration xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://sumo.sf.net/xsd/sumoConfiguration.xsd">

    <input>

        <net-file value="net.xml"/>

        <route-files value="rou.xml"/>

        <additional-files value="add.xml"/>

    </input>

    <output>

         <tripinfo-output value="output/tripinfo.xml"/>

         <tripinfo-output.write-unfinished value="true"/>

    </output>

    <report>

         <duration-log.statistics value="true"/>

         <message-log value="output/statistic.xml"/>

         <error-log value="output/error.log.xml"/>

    </report>

    <time>

        <begin value="0"/>

        <end value="81600"/>

        <step-length value="0.01"/>

    </time>

    <gui_only>

        <start value="true"/>

        <gui-settings-file value="gui.xml"/>

    </gui_only>

</configuration>