Hey my Olympus 230 digital camera seems to have deleted my photos, a message appeared on the camera "picture error", just wondering how I can get them back??

Depending on your descriptions, there might be something wrong with your Olympus 230 digital camera or memory card (system error). In order to maximize the recovery of lost pictures, my suggestions are:
(1) Immediately stop shooting new photos. This is to avoid lost photos be overwritten by the new photos, which will cause the lost photos unrecoverable.
(2) Download and install the professional Olympus Photo Recovery software (http://www.olympus-photo-recovery.com/) to your PC or Mac, and restore the lost files ASAP.
Best wishes!

If you are using a memory card, take no more pics until you've recovered the photos, take the card out of the camera. This is to reduce the chance of you overwriting some of your "lost" photos. There are many good freeware photo recovery software options that are available to help you recover your photos. This blog article reviews and outlines several of the better ones.
All the download links listed in the article are through CNET, primarily to verify that these are malware free software, and to give you a chance to read user reviews on the software before downloading.