Nmk004.bin [ 8K — 480p ]

This specific filename appears in several NMK-related games. One notable example is:

Due to the nature of this file, we cannot provide direct download links. However, we can explain the safe and proper channels used by the community. nmk004.bin

When you see these, MAME is telling you that either the file is missing from your ROM zip archive, or the copy you have is corrupted or incorrectly dumped. This specific filename appears in several NMK-related games