[en] Inclusive and exclusive (π,η) reactions are studied in the framework of a momentum space DWIA model. It is assumed that both reactions are dominated by formation of an N(1535) resonance. Medium corrections for the self-energy of the intermediate N^* are taken into account. Cross sections are calculated for (π⁺,η) inclusive reactions on ¹²C and compared with experiment and with existing theoretical calculations. We show that quantitative agreement is obtained with experimental data, assuming this reaction is dominated by quasifree single-nucleon knockout, and using an N^* free width of 150 MeV. Differential and total cross sections are calculated for the exclusive reaction ¹³C(π⁺,η)¹³N