### 3.2.3. Opening CFX-Solver Input (.def, .mdef), Results (.res), Transient (.trn) or Backup (.bak) Files

CFX-Solver input and results files from the current and previous releases of CFX can be opened. When opening these files, a new case file is created. The mesh and physics are imported into the new case. All preprocessing information in these files is imported into CFX-Pre and is edited in the same way as in other case files.

CFX-Pre can also load “full” transient results file (*.trn) or backup file (*.bak) by typing *trn or *bak, respectively, as the File Name in the Load Case File dialog box. Using the `*` character returns a list of available files of type *.trn or *.bak. The selected file is imported as a CFX-Solver input file.

Note:

- If a Release 11.0 .def file containing automatically generated interfaces is loaded into CFX-Pre, and these interfaces were generated as a result of 'contact' information in the original .cmdb file, these interfaces may be removed by CFX-Pre. This is a problem only when loading Release 11.0 .def files, and will occur only in a small percentage of cases. Loading a .cfx file will work correctly.

- It is not possible to load an .mres file into CFX-Pre.

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