I had a very large value for Exp(B) in SPSS binary logistic regression. What is wrong and what should I do?
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This usually indicates a problem with Quasi-Complete (categorical variables) or Complete Separation (continuous variables).
Quasi-complete: Where you have one category of a class variable x that has only one type of outcome (y=0 or y=11)
Complete Separation: some breaking point in a continuous variable where target has only one type of outcome on either side. For example, if $x>5$ then y=1 in all cases and if $x\leq 5$ then y=0 in all cases.