Update src/mip/coefficient_strengthening.jl

Co-authored-by: mtanneau <9593025+mtanneau@users.noreply.github.com>
mtanneau · Jan 30, 2021 · 3e7fdc3 · 3e7fdc3
1 parent 1ea9b79
commit 3e7fdc3
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/mip/coefficient_strengthening.jl b/src/mip/coefficient_strengthening.jl
@@ -138,7 +138,7 @@ function zero_coefficient_strengthening!(ps::PresolveData{T}) where {T}
                     ps.pb0.acols[j].nzval[i_index[j]] = new_coef
                     ps.urow[i] = new_bound
                     #update nonzero
-                    if new_coef == 0
+                    if !iszero(coef) && iszero(new_coef)
                         ps.nzrow[i] -= 1
                         ps.nzcol[j] -= 1
                     end