I am receiving the following error when attempting to run a report from our agency management software. "Application Error -- The instruction at "0x77c46803" referenced memory at "0xffffffff". The memory could not be "read". Sometimes the message reads: "Application Error -- The instruction at "0x7c9111de" referenced memory at "0x006f0070". The memory cound not be read. My desktop originally had Windows 2000 Professional on it and received this error. At that time I worked with tech support (our agency management software tech support) on this problem. The problem ONLY happens when attempting to run certain reports from this product. After working diligently on this problem they suggested I re-intall my operating system. So, I then re-formatted my hard drive and loaded Windows XP professional on this desktop. I am now receiving the same error! When I started having this problem I purchased an additional 512Kb of memory, I have tried only taking out one chip of the memory (the older one) and only using the new chip. Same error. Do you think this could be a motherboard problem, and if so is there any way to test this other than replacing the motherboard? Any input would be appreciated. Thank you.