insufficient memory message.

[#1]

I use lightroom to process my RAW files along with a second program (Photomatix) to produce HDR images.
It can manage to process about 6 HDR images and then I get a warning about insufficient memory. Restarting the computer resolves the problem until I process another 6 images.
It appears that at some stage memory is not being released once the HDR image is transferred back into Lightroom
Is it possible to free up memory without coming out of lightroom or photomatix ?
I am using XP with a fairly fast processor and 4 GB RAM so there is no shortage of memory.
I have heard of programs like cacheman XP would that help or am I on the wrong track ?

[#2]

I suspect that you are running into the 32bit program memory  limit not total physical or virtual ram

[#3]

Is there any way around this..........or is it something I just have to accept ?
Not that it's a major problem.

[#4]

Get a better operating system - Windows 7 64 bit

Quote

Does Photomatix work on 64-bit OS? Yes, Photomatix Pro and Photomatix Light work fine with the 64-bit edition of Windows XP, Vista and 7, and work fine on 64-bit Mac OS. Moreover, Photomatix Pro for Windows is available as 64-bit edition and Photomatix Pro and Photomatix Light for Mac OS X are 32/64-bit Universal, and thus take advantage of the 64-bit capability of your OS.

http://www.hdrsoft.com/support/faq_photomatix.html#size
http://www.computer-darkroom.com/lightroom_2_beta/lr-2-beta.htm
There may be a memory leak problem but I have only seen that reported with a Mac operating system

[#5]

Which version of Photomatix are you using? According to:
http://hdr-blog.de/index.php/news-ueberblick/60-photomatix-pro-32
"Bug fixed: generating an HDR image from more than eight files of 21 MegaPixels each and in 16 bits/channel crashed due to insufficient memory."
Regards,
Neil

[#6]

Njal,
I am running the latest version of Photomatix 3.2 but thanks for the tip.