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Files

In CadnaA all files have the file extension CNA which does not need to be entered when saving a file, but is appended to the file name automatically. The import feature (see there) enables to import a CadnaA file into an existing file.

New

Selecting the New command on the File menu opens a new, „blank“ file . If a file has already been opened and edited, but the modifications have not yet been saved, a safety check dialog appears enabling to save the present file.

New (Template)

Selecting the command New (Template) from the File menu, the user can select a template, which can either be an internally defined template or a user-defined .cna-file, which is used as template. The drop down menu shows entries of following sources:

  • CadnaA internally defined templates (Entries w/o ending .cna): If selected and clicked on OK, parameters of the configuration of calculations, the building noise map menu and the land use are set. The chosen template is also saved in the configuration of calculations and checked again before each calculation. For this type of template the documentation as described in the CadnaA Reference manual, chapter 6 applies. The CadnaA Reference Manual contains a complete listing of all available templates incl. literature reference to the considered standards, guidelines or calculation methods.
  • User-defined .cna-files (entries w/ ending .cna): CadnaA users can save own files, which are to be used as templates, in the installation directory under templates/new. All .cna files in this directory are listed in the dialog and can be selected as templates.

Note

The path used for user-defined files can be changed via the ini entry NewTemplateDir in the [Main] section, e.g. "NewTemplateDir=S:\templates". When defining a shared server path, for example, the same files can be used for several users.

When selecting this command with a file opened which has been modified, a safety message will appear offering to save the present file first.

Open

Selecting the command Open from the File menu (or by clicking the symbol on the symbol bar) an existing file can be selected, opened, and edited (or by the key combination: CTRL+O).

Save

Selecting this command on the File menu saves the present file (including any changes) using the existing filename. If it is a new file which has not been saved before the Save As dialog opens.

Save As

With the Save As command, a new file can be entered saving the file using that name. In case the new filename already exists, a safety check dialog appears enabling to cancel the saving procedure.

Clicking „Yes“ will overwrite the existing file. Clicking „No“ cancels the saving procedure. In this case the active file must be saved using a different, not existing filename.

Lock Files

An opened file can be locked. In this case the file cannot be saved using the same filename. To this end, select the command Lock on the File menu.

When attempting to save this file with the same filename, a dialog indicating the locking is displayed. In this case the locking can be reversed by clicking „Yes“ or be canceled by clicking „No“. A locked file can only be saved using a different filename.

When having activated the Auto-Save feature (menu Options|Auto-Save) the dialog will open as well if the filename of the auto-save-file uses the filename of the locked file. Enter a different filename to auto-save your file, if necessary.

Exit

Select this command to exit CadnaA. If the active file has been edited but not yet been saved, a dialog appears enabling to save this file prior to closing the software.