Error from eclipse : Could not find the main class: org.apache.catalina.startup.Bootstrap

hi friends.. if you used Eclipse and got this kind of error:

"Could not find the main class: org.apache.catalina.startup.Bootstrap"

the easiest way to repair this error is:

(no need to add any external jar files like tomcat-juli)

1.check your tomcat manually by going to the apache tomcat directory -> bin and run your:

sudo ./run.sh

from your console

2.check if everything is ok and that you can go to the localhost server without error ex: http://locahost:8080/

if ok then shutdown your tomcat by running:

sudo ./shutdown.sh

3.check the eclipse. and if only eclipse have the error of the bootstrap..

4.backup all your important sourcefiles from your eclipse workspace.

5.without hesitation run :

sudo rm -rf workspace/

6.open your eclipse: (of course you will create new directory for workspace)

File->New->Other->Server->choose Server->click Next -> choose your type of apache tomcat.. mine is v6.0 server ->finish...

and start the server...