I'm using DP11.34 and upgraded to DP11 as soon as it came out. I had been getting these errors consistently with sessions that originated as brand new DP11 sessions and were never started as DP10, across multiple sessions. It's a frustrating error for sure. I'm still using Mac OS 12.7.6 and I've wondered too if it has something to do with that at all, but I don't want to go to a newer OS now that everything is stable.mikehalloran wrote: ↑Wed Mar 05, 2025 11:22 am It has nothing to do with Time Machine. Period. MOTU was telling people that after reading it here.
It is a DP 10 bug that affects Save (may have first shown up in DP 9). The actual bug was posted last year but not in this thread and I didn't copy it over for reference. When it appears randomly, it's when Autosave is enabled.
The workaround I posted of navigating to your project folder and letting it overwrite works 100% of the time. When I have walked people through it who said it didn't work, it worked.
You may see it in DP 11 if you open a DP 10 file. If you did any work, navigate to the project folder and overwrite. If you haven't done any work yet, Quit, reopen and immediately Save as DP11—you will be prompted to do so on your first Save. I now Save every old project immediately on opening as DP11 and have not seen it since.
If you have not upgraded to DP 11, do so. It fixed a number of unresolved bugs. 11.34 released last week fixed even more including some that go back to DP 7.2x.
"File Not Found (-43)"
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This forum is for most discussion related to the use and optimization of Digital Performer [MacOS] and plug-ins as well as tips and techniques. It is NOT for troubleshooting technical issues, complaints, feature requests, or "Comparative DAW 101."
This forum is for most discussion related to the use and optimization of Digital Performer [MacOS] and plug-ins as well as tips and techniques. It is NOT for troubleshooting technical issues, complaints, feature requests, or "Comparative DAW 101."
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Re: "File Not Found (-43)"
Re: "File Not Found (-43)"
Since 11.34 is new, I ran the Time Machine autoatic backup experiment. Got away with no (-43) error for 10 days, this mirrors previous experience, then today it happened, DP froze in the middle of recording, had to force quit. Time Machine hourly snapshot coincided with the error. FWIW!
Doug Williams
Electromagnetic Radiation Recorders
The Martha Bassett Show broadcast mixer
Tape Op issue 73
DP 11.34
Studio M1 Max OS12.7.6
MOTU 16A and Monitor 8
M1 Pro MBP for remotes and editing
Electromagnetic Radiation Recorders
The Martha Bassett Show broadcast mixer
Tape Op issue 73
DP 11.34
Studio M1 Max OS12.7.6
MOTU 16A and Monitor 8
M1 Pro MBP for remotes and editing
- James Steele
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Re: "File Not Found (-43)"
I honestly think you're onto something. Perhaps it's NOT supposed to be happening, but really seems like it's linked. I don't like the idea of Time Machine cranking away when I'm working in DP. Perhaps it's something in DP's code causing the problem.EMRR wrote: ↑Wed Mar 19, 2025 8:55 pm Since 11.34 is new, I ran the Time Machine autoatic backup experiment. Got away with no (-43) error for 10 days, this mirrors previous experience, then today it happened, DP froze in the middle of recording, had to force quit. Time Machine hourly snapshot coincided with the error. FWIW!
I'm seriously only doing manual Time Machine backups and it's not really a big deal. I may run them once or twice a day. Generally when I walk away from the machine for any length of time, I'll start one. But I do not have it running when doing any audio work.
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Mac Studio M1 Max, 64GB/2TB, macOS Sequoia 15.5 Public Beta 2, DP 11.34, MOTU 828es, MOTU 24Ai, MOTU MIDI Express XT, UAD-2 TB3 Satellite OCTO, Console 1 Mk2, Avid S3, NI Komplete Kontrol S88 Mk2, Red Type B, Millennia HV-3C, Warm Audio WA-2A, AudioScape 76F, Dean guitars, Marshall amps, etc., etc.!
- mikehalloran
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Re: "File Not Found (-43)"
Was it a new file or an old one? I've not had it happen with a new file in DP 11.EMRR wrote: ↑Wed Mar 19, 2025 8:55 pm Since 11.34 is new, I ran the Time Machine autoatic backup experiment. Got away with no (-43) error for 10 days, this mirrors previous experience, then today it happened, DP froze in the middle of recording, had to force quit. Time Machine hourly snapshot coincided with the error. FWIW!
A DP 10 file opened in 11 can give certainly give it — I was not at all happy seeing it after I upgraded to 11. For that reason, I immediately save old files as DP 11 upon opening. Since I got in the habit, I've not experienced -43 once.
When I was testing this, it happened to me in DP 10 with Time Machine off. I already knew there was no correlation but that proved it beyond all doubt.
MOTU has never seen it last I talked to anyone. They read about a connection to TM here.
Maybe next week I will search for the actual DP 10 bug. It was reported here last year or the year before. I've been a bit busy.
DP 11.34; 828mkII FW, micro lite, M4, MTP/AV USB Firmware 2.0.1
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2023 Mac Studio M2 8TB, 192GB RAM, OS Sequoia 15.4, USB4 8TB externals, Neumann MT48, M-Audio AIR 192|14, Mackie ProFxv3, Zoom F3 & UAC 232 32bit float recorder & interface; 2012 MBPs (x2) Catalina, Mojave
IK-NI-Izotope-PSP-Garritan-Antares, LogicPro X, Finale 27.4, Dorico 5, Notion 6, Overture 5, TwistedWave, DSP-Q 5, SmartScore64 NE Pro, Toast 20 Pro
Re: "File Not Found (-43)"
The other day it was a file that had migrated from 7 to 8 to 11, skipped 9-10. The previous 10 days of activity was all in that same file, no problems.
It’s a wild guess - some particular write action (automatic or manual) in DP that coincides with the finish of a TM automatic backup might be causing the conflict. I’m also guessing here: more prevalent during recording? It certainly shocks the mind more.
Curious to know about this other bug.
It’s a wild guess - some particular write action (automatic or manual) in DP that coincides with the finish of a TM automatic backup might be causing the conflict. I’m also guessing here: more prevalent during recording? It certainly shocks the mind more.
Curious to know about this other bug.
Doug Williams
Electromagnetic Radiation Recorders
The Martha Bassett Show broadcast mixer
Tape Op issue 73
DP 11.34
Studio M1 Max OS12.7.6
MOTU 16A and Monitor 8
M1 Pro MBP for remotes and editing
Electromagnetic Radiation Recorders
The Martha Bassett Show broadcast mixer
Tape Op issue 73
DP 11.34
Studio M1 Max OS12.7.6
MOTU 16A and Monitor 8
M1 Pro MBP for remotes and editing
- daniel.sneed
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Re: "File Not Found (-43)"
Not sure but it may be a OS 12/7/6 thing.
Not sure every 12/7/6 user are hit, though.
Happens within an hour if DP is up and TM is set to automatic backup.
My routine is still TM manual backup at session end.
A workaround, not a solution.
Not sure every 12/7/6 user are hit, though.
Happens within an hour if DP is up and TM is set to automatic backup.
My routine is still TM manual backup at session end.
A workaround, not a solution.
dAn Shakin' all over!
DP11.34, OS12.7.6, MacBookPro-i7
Falcon, Kontakt, Ozone, RX, Unisum, Michelangelo, Sparkverb
Waldorf Iridium & STVC & Blofeld, Kemper Profiler Stage, EWIusb, Mixface
JBL4326+4312sub, Behringer X32rack
Many mandolins, banjos, guitars, flutes, melodions, xylos, kalimbas...

DP11.34, OS12.7.6, MacBookPro-i7
Falcon, Kontakt, Ozone, RX, Unisum, Michelangelo, Sparkverb
Waldorf Iridium & STVC & Blofeld, Kemper Profiler Stage, EWIusb, Mixface
JBL4326+4312sub, Behringer X32rack
Many mandolins, banjos, guitars, flutes, melodions, xylos, kalimbas...
Re: "File Not Found (-43)"
These systems have been 12 throughout, and it’s ranged from nonexistent to intermittent to constant, then back again.daniel.sneed wrote: ↑Sat Mar 22, 2025 10:46 am Not sure but it may be a OS 12/7/6 thing.
Not sure every 12/7/6 user are hit, though.
Doug Williams
Electromagnetic Radiation Recorders
The Martha Bassett Show broadcast mixer
Tape Op issue 73
DP 11.34
Studio M1 Max OS12.7.6
MOTU 16A and Monitor 8
M1 Pro MBP for remotes and editing
Electromagnetic Radiation Recorders
The Martha Bassett Show broadcast mixer
Tape Op issue 73
DP 11.34
Studio M1 Max OS12.7.6
MOTU 16A and Monitor 8
M1 Pro MBP for remotes and editing