Can't save the project using the specified extension

Tried to save a project file using an extension other than .ACD, .L5K or .L5X. Project file names must use the .ACD extension; import/export files of entire projects must use the .L5K or .L5X extension.

.L5K

A file format used for text files imported and exported by the

Logix Designer

application. An .L5K file contains an ASCII representation of the data for an entire project and, when imported, creates a new project file or overwrites an existing project file. This is in contrast to the .CSV.

The file extension for this format must be .L5K; if you change the extension using a tool like the Windows Explorer, the

Logix Designer

application is not able to import this file.

.L5X

The .L5X file is structured using Extensible Markup Language (XML) tags. In addition to being able to open and modify the .L5X file in a text editor, such as Notepad, also view the contents of the file in Microsoft Internet Explorer and other tools that work with XML files.

Import and export a project by exporting ladder rungs (including the referenced tags and data types), trends, User-defined Data Types, Add-On Instructions, programs, equipment phases, and routines to an .L5X file and importing it into the required project.