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I have solved my own problem. The problem was my program set the "enable parity interrupt" bit on the VMEchip2. The documentation says the bit is not used for the 162 board. I would have preferred that if the bit is not used that their should be no ill effects if you happen to try and use it but that's not the case. Also the "enable abort interrupt" on the VMEchip2 is also not used on the 162 and my guess would be that you shouldn't enable it either else you might suffer the same intermittent interrupt problem. These boards use the new ASIC that replace some chips that were used on the original 162 boards. Happy coding!!! Duane
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