Originally posted by: SystemAdmin

[zhzhang said:]

I invoke a callback to get the value of a variable, which is defined as the sum of other variables, at each nodes. For instance, z>=x1+x2+x3, where z, x1, x2, x3 are all variables.  I , however, find that the value gotten by invoking function getValue(z) is less than the sum of getValue(xi) at some nodes. What's reason? Thanks.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

[prubin said:]

Is the value of z slightly less than the sum of the other variables (which could be rounding error) or significantly less?
#CPLEXOptimizers
#DecisionOptimization