DATAERR0R is an instrumental electronic track by South Korean producer Cosmograph (Joo Jong-hyun, also known as Lunatic Sounds). The song originated from the Be-Music Source (BMS) contest "大血戦, THE BMS OF FIGHTERS ULTIMATE," where it achieved the highest rating among all entries. Its BMS genre is classified as Artcore, blending hard-driving drum-and-bass rhythms with layered synth melodies at a steady 180 BPM. The version used in maimai and most other rhythm games is a remastered recording distinct from its original BMS release, and the accompanying video was also remastered for arcade presentation. DATAERR0R was added to maimai でらっくす PRiSM PLUS on April 11th, 2025 in Japan and internationally, with the Asian version following on August 22nd, 2025. Beyond maimai and CHUNITHM, where it debuted in the CHUNITHM AIR version, the track has been licensed across more than a dozen rhythm game titles including Arcaea, DJMAX RESPECT V, EZ2ON REBOOT: R, Muse Dash, SOUND VOLTEX, Phigros, and KALPA, making it one of Cosmograph's most broadly circulated compositions. The title itself is a leetspeak rendering of "Data Error," reinforcing the glitchy, cyberpunk aesthetic that permeates both the music and its futuristic visual presentation by artist Photon-S. In maimai, the title appears fully capitalized as DATAERR0R and the artist is credited as Cosmograph, differentiating from some other games where the track is attributed to Lunatic Sounds.