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fix: write empty constraint rows #1946

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fix: write empty constraint rows #1946

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2 changes: 1 addition & 1 deletion cpp/src/io/mps_writer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -265,7 +265,7 @@ void mps_writer_t<i_t, f_t>::write(const std::string& mps_file_path)

// iterate over the constraint matrix and add the nonzeros to the integral and continuous col_nnzs
// maps
for (size_t csr_row = 0; csr_row < (size_t)n_constraints; csr_row++) {
for (size_t csr_row = 0; csr_row + 1 < constraint_matrix_offsets.size(); csr_row++) {
const i_t row_id = static_cast<i_t>(csr_row);
for (size_t k = (size_t)constraint_matrix_offsets[csr_row];
k < (size_t)constraint_matrix_offsets[csr_row + 1];
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