什么原因导致在崩溃时不创建hs_err_pid文件?

I need to investigate crashes of a Java client application. It's s Swing application, running in Java Web Start environement on Java SE 6 Update 23 on Windows. Unfortunately for some crash cases the hs_err_pid file was not created. It wasn't on the desktop, so I've searched for it on PC and did not find it(there was an old hs_err_pid file on the desktop, for the same application, so it's reasonable to assume the new one should have been created there too). There is no exception in the log in the end, as it usually happens when JVM crashes on Java exception, so it looks like a crash that should result on creation of hs_err_pid file.I need to investigate crashes of a Java client