NaN in TOUGHREACT 3 EOS2 simulations

Hello Everyone, I'm using TOUGHREACT 3 with EOS2. When I run the simulation (which runs well in TOUGHREACT 2) the results are NaN in the aqueous concentrations and minerals. I made the needed accoodation in the input files from TOUGHREACT2 to TOUGHREACT3 and used provided windows eseguible. Moreover, in the Toughreact 3 package the sample problems for ESO2 are missing, so I cannot check if I got wrong some flags. Someone can help me, please? Thanks in advance