HEllo Eduarte,
You can try by using CLW, below example exporting Error:
java -Dintroscope.clw.tt.mode=Async -Xms512m -Xmx512m -Duser=XXXXX -Dpassword=XXXX -Dhost=XXXXX -Dport=XXXX -jar CLWorkstation.jar get historical event summaries matching "type:errorsnapshot and host:XXXXX and time[20131125 TO 20131130]
Gustavo.