During installation i edited the next file on line 158 with nano:
nano -c +158 /opt/jasperserver6.1/buildomatic/bin/import-export.xml[/code]
And changed the line from:
<java classname="${class}" fork="true" failonerror="true" inputstring="">[/code]
To:
<java classname="${class}" fork="true" failonerror="false" inputstring="">[/code]
An it success completing the installation!! jaja!