Cplex data element has already set

Question

my Cplex model has this error in data section "data element has already set" but its not set, maybe i could not import data correctly, can anyone help me to solve this problem?

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Answer 1

In your .mod you have not written =...; but = with a value or with a semi-colon.

.mod

int a;

.dat

a=2;

gives the same error but if you change

int a;

into

int a=...;

then it's fine