Javaassist Catch Block e.printStackTrace

Question

We have the below Javaassist Code to add printStackTrace() to a catch block present inside a 3rd party Class

int position = catchBlocks[i].block().position();
int lineNumber = ctMethod.getMethodInfo().getLineNumber(position);
ctMethod.insertAt(lineNumber + 1, "System.out.println(\"Catch Block\");");
ctMethod.insertAt(lineNumber + 2, "e.printStackTrace();");

But, when we run - it throws the below error javaassist.CannotCompileException: [source error] no such class: e

What is that we are missing here?

Thanks in Advance!