The file extension XPM identifies bitmap images in the format of the X-Windows system. This format is based on ASCII (American Standard Code for Information Interchange) text and is mainly used for icons. It supports grayscale, monochrome and 256 colors. The files can theoretically be opened and edited in any text editor.
X-Windows is a GUI (Graphical User Interface) system to set up graphical user interfaces for Unix and Linux systems.
Most often resolving problems with opening XPM files is very simple. Just install an appropriate program that supports such files. All of the listed programs support XPM files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of XPM files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate XPM files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the GIMP applications is not on the list, select "Browse" option in order to manually locate the directory where GIMP has been installed.
Sometimes problems with opening XPM files may not lie with the application itself, but can arise due to other causes, such as: