Catching java.lang.NullPointerException with cftry/cfcatch?

[EvolvedDSM]

I'm getting a java.lang.NullPointerException returned on an update function in a CFC:
"The cause of this output exception was that: java.lang.NullPointerException."

I want to find where it's generating this error so I can fix it. I've never really used CFTRY and CFCATCH, but figured now would be a good time to learn if this helped me track down the null. Can anyone provide an example of how to use these tags with the above NPE and output a message that give info on where it's faulting?

I'm using a standard update query,
<cfquery>
UPDATE table
SET columns = new values
WHERE ID column = some ID
</cfquery>

[Dan_Bracuk · Accepted solution]

In your cfcatch block of code, mail yourself a cfdump of the cfcatch structure.

[EvolvedDSM]

That was a great tip Dan. Helped me find the line. Apparently a datatype "date" was given an incorrect null value. I figured the problem and the update works now :)

Here's code incase someone wants to know: