Ren
Ansys Employee
  1. Please check in the Fluent working directory if there is a file named chem.out, and if yes, check its content to see if there are any error messages.
  2. The second screenshot shows that the path name for the thermo.db file contains non-ASCII characters. This might be the cause of the error. Are you using a non-English version of Windows? Does the path name look normal to you?