How to handle RAMRunTimeException

I have created web based excel batch upload application.
Now problem is that, I want to pass all exception (like, some required attribure not provided for asset x etc..) to my error.jsp......

but looks like ram api handles all ramruntimeexception internally only, so i am able to see those in console, but not able to pass/use them anywhere.

for ex try
{//some code
session.putAssets(new NullProgressMonitor());
//some code
Catch (Exception e)
{
System.out.println(e.getMessage());
}
here in case of exception its getting handled internally and not even entering in my catch method.

Any suggestions?