@JamesPower4 - Appreciate your kind words. I suggest SAS Tech Support is your best option. The problem is there have been a lot of different versions of Access over the years and the same with SAS so figuring out what works with what is a bit of a minefield.
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Many thanks for the quick reply. I do believe it's OK, but just to be safe I want to find out if anyone has encountered corruption of their datasets.
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Sounds like you simply need to change your predictors from binary variables, to continuous predictors that are estimates of the total light exposure and total flood (and/or ebb) exposure.
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