Files with the extension XLM4 contain macros of the spreadsheet software Microsoft Excel.
Macros are small, user-definable scripts or programs that control Excel. This allows repetitive tasks to be recorded and executed in a macro. Unfortunately, these macros can also contain malicious code, which is why it is advisable, especially for files from unknown sources, to subject them to a virus check before executing the macros.
Macros can be created with the menu item 'Record macro'. A macro can also be assigned a keyboard shortcut.
Most often resolving problems with opening XLM4 files is very simple. Just install an appropriate program that supports such files. All of the listed programs support XLM4 files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of XLM4 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 XLM4 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 Microsoft Excel applications is not on the list, select "Browse" option in order to manually locate the directory where Microsoft Excel has been installed.
Sometimes problems with opening XLM4 files may not lie with the application itself, but can arise due to other causes, such as: