MESSAGE DECODER
What the screen is telling you
Reviewed: 18 September 2026
Booth briefing. Read the message off the screen, find it below, and you have what the maker says it means and the page that fixes it. Only messages a maker documents are listed, each with the document it comes from. If a message you saw is not here, it is not because it does not matter: it is because no maker has published what it means, and this site does not guess.
CDJ, XDJ, OPUS and OMNIS players
| Message | Where it appears | What the maker says it means | Page |
|---|---|---|---|
E-8302 CANNOT PLAY TRACK |
CDJ-3000, CDJ-3000X, CDJ-1500X, XDJ and OPUS players | The player cannot read the file; AlphaTheta name a damaged file as the usual cause and say to test it on another player that handles the same formats. AlphaTheta, CDJ-3000 error messages | Open |
E-8304 / E-8305 UNSUPPORTED FILE FORMAT |
CDJ-3000, CDJ-3000X, CDJ-1500X, XDJ and OPUS players | The loaded file is in a format the player does not support; the fix is the file, matched against the supported list in the Operating Instructions. AlphaTheta, CDJ-3000X error messages | Open |
USB FULL |
CDJ-3000, CDJ-3000X; on the CDJ-2000NXS2 also a write-protected drive | Recording and the saving of cue points are disabled for lack of free space on the drive; playback continues. AlphaTheta, CDJ-3000 error messages | Open |
FILE MAX |
XDJ-RX3, when recording to USB | The PIONEER REC folder on the drive already holds the maximum of 999 recorded files, or a file named REC999.WAV exists; delete, move or rename before recording. AlphaTheta, XDJ-RX3 error messages | Open |
REC ERROR |
XDJ-RX3, when recording to USB | The write failed, or the connected drive cannot be recorded or written to; the maker's instruction is to use a different drive. AlphaTheta, XDJ-RX3 error messages | Open |
READ ONLY |
XDJ-RX3, on connecting a drive | The connected drive is read-only or its file system may have failed; use another drive, or copy what you need to the computer and reformat it. AlphaTheta, XDJ-RX3 error messages | Open |
CUE/LOOP POINT FULL |
CDJ-2000NXS2, CDJ-2000NXS, CDJ-900NXS (POINT FULL on the CDJ-2000 and CDJ-900) | The ceiling is 100 cue or loop points per disc and 10 per track on an SD card or USB drive; delete one before saving another. CDJ-2000NXS2 Operating Instructions | Open |
CARD PROTECTED / CARD FULL |
CDJ-2000NXS2 | A write-protected SD card, or an SD card with no room; the player cannot save points to it. CDJ-2000NXS2 Operating Instructions | Open |
E-9101 MECHANICAL TIME OUT |
CDJ-2000, CDJ-900 (disc mechanism) | The disc mechanism did not finish loading or ejecting in the time it is given; a drive problem, not a file problem. AlphaTheta, CDJ-2000 firmware change history | Open |
E-8306 NO FILE |
CDJ-2000, CDJ-900 | A track is still listed in a library or playlist but has been deleted from the card or drive; the fix is on the computer that prepared it. AlphaTheta, CDJ-2000 firmware change history | Open |
Emergency Loop |
XDJ-RX3, OPUS-QUAD and current players | The unit plays a beat loop because the next track could not start when the current one ended; load a track to cancel it. XDJ-RX3 manual, AlphaTheta | Open |
Not Analyzed |
CDJ and XDJ players, on loading a track | An analysed track loaded in folder browsing mode is treated as unanalysed and shows this; load it from the library view instead. AlphaTheta, Not Analyzed on loading a track | Open |
rekordbox on the computer
| Message | Where it appears | What the maker says it means | Page |
|---|---|---|---|
Analysis Failed. There is not enough memory available. |
rekordbox, Windows and Mac | Memory, not disk: close applications, the web browser and Explorer or Finder, then analyse again. AlphaTheta, Analysis Failed | Open |
Not enough space on the device |
rekordbox, on export | The library needs 600 kB plus about 103 kB per track of free space on the drive, on top of the audio. AlphaTheta, free space needed for a library | Open |
File is missing |
rekordbox collection, track greyed out | rekordbox cannot find the audio file at the path it recorded, most often after a drive letter or folder change; relocate it, the audio is not lost. AlphaTheta, tracks shown as missing | Open |
Serato DJ Pro and Lite
| Message | Where it appears | What the maker says it means | Page |
|---|---|---|---|
Serato DJ has stopped working |
Serato DJ Pro and Lite, Windows | A crash, in Serato's definition: the software unexpectedly closes and the audio stops at once; their five-step order starts with updating Serato and the operating system. Serato, crashes troubleshooting guide | Open |
A white triangle with an exclamation point |
Serato DJ Pro and Lite, after a crash | Serato's own crash indicator; their guide asks you to report it from that icon so the crash log reaches them. Serato, crashes troubleshooting guide | Open |
Engine DJ
| Message | Where it appears | What the maker says it means | Page |
|---|---|---|---|
Drives that have operations in progress cannot be ejected. |
Engine DJ desktop | Wait for the export or analysis to finish, then eject from the media devices panel or Sync Manager. Engine DJ User Guide, via enginedj.com | Open |
DRM-protected files cannot be added. |
Engine DJ desktop | A protected or streamed file is not yours to add; the same guide also wants album art under 1 MB and a supported format. Engine DJ User Guide, via enginedj.com | Open |
Stems files cannot be played back in the Engine DJ software. |
Engine DJ desktop | Stems are rendered on the computer and heard on the deck only; that is the design, not a fault. Engine DJ User Guide, via enginedj.com | Open |
Streaming services inside rekordbox
| Message | Where it appears | What the maker says it means | Page |
|---|---|---|---|
The recording function cannot be used. |
rekordbox, with a streaming track loaded | Copyright restrictions set by the streaming services; the same FAQ says streaming tracks do not export to USB either. rekordbox streaming FAQ | Open |
Tracks cannot be played offline. |
SoundCloud Go+ in rekordbox | The service's own rule; the offline guide says which services play with no internet and which do not. rekordbox streaming FAQ | Open |
Where each line comes from
Every row names its document. AlphaTheta publish error messages per model in the support articles for the CDJ-3000 and CDJ-3000X and in each unit's Operating Instructions; rekordbox messages come from AlphaTheta's rekordbox support articles; Serato's from their crash guide; Engine DJ's from the Engine DJ User Guide. Message text is printed as the screen prints it.
Saw a message that is not here? Tell us what it said and which unit showed it, and we look for the maker's document.
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