MIB files can be nested, which means that MIB files can contain links to other MIB files. If the compiler detects a link to another file, it starts compiling that file first. Sometimes the filename mentioned in the MIB file does not match the actual filename on disk. If the compiler detects such a situation, it searches for the filename that matches most closely to the filename in the MIB file and - depending on the selection from the Intervention box - prompts the user for confirmation. If the setting of the Intervention box is "No questions" (the default), the compiler uses an intelligent algorithm to overcome the "loading order" problem.
You should only use the Intervention box to select another approach if the default settings do not perform well. If you select "Suggestions only", the Compiler sometimes pops up with a suggestion dialog box asking for confirmation. You can gain full control by selecting "Full control" from the Intervention box. This setting lets you select all required MIB files manually. This setting is not intended for inexperienced users!