Problem is memory allocation due to a SQL issue.

How many rows would you expect this query to return:

SELECT COUNT(*) FROM a_table LIMIT 10

I was expecting this to return 10.  Stupid really, it returns 1 row!
Which contains the total number of rows in the table.  You can guess the 
rest...  Allocating too little memory etc...

This was the problem with another non-SDI webservice I am working on. 
It may be your problem.  But it's a bugger to find, so if you can let me 
know if you still have this problem (with suggested re-coding) it would 
help me.