Error re-starting war application

[ingo . bischofs]

Hi list

I've posted that question already before. 

I am using Eclipse WTP for development of a web application and use it's 
'Export' function for creating the .war file.
Installing that application on Tomcat 5.5.x works fine.

But, stopping and re-starting the application fails every time with a 
NullPointerException. Do you have any hints?

Thanks