DSDPlus Problem with the new version of DSD+

[Cerrazul27]

Hi, today I've been trying to install the new version of DSD+ but I'm having problems. I have the "TCP Server" plugin in AirSpy on port 20001 and DSD on the same port, but I'm getting this error.


The error keeps repeating in a loop. I've searched for more information online and on chatgpt, but the little information I find is either useless or outdated. That's why I'm asking for your help. It might be a simple error, but I'd be very grateful for any assistance. Thank you very much.
Here's what the console says.

2026.02.14 15:57:28 DSD+ 2.547 2026.02.14 15:57:28 Current working directory is "C:\Users\CRES\Downloads\DSDPlusFull" 2026.02.14 15:57:28 DSDPlus -h for help summary 2026.02.14 15:57:28 2026.02.14 15:57:28 Appending synthesized audio to file '1R-DSDPlus.wav' 2026.02.14 15:57:28 2026.02.14 15:57:28 Assuming FMPA/FMPP/FMP24 is signal source; auto polarity detect is disabled 2026.02.14 15:57:28 2026.02.14 15:57:28 audio output device #1 = 'Altavoces (Realtek High Definit' 2026.02.14 15:57:28 audio output device #2 = 'CABLE In 16ch (VB-Audio Virtual' 2026.02.14 15:57:28 audio output device #3 = 'CABLE Input (VB-Audio Virtual C' 2026.02.14 15:57:28 2026.02.14 15:57:28 audio output device #1 (Altavoces (Realtek High Definit) initialized 2026.02.14 15:57:28 2026.02.14 15:57:28 2026.02.14 15:57:28 Testing Base Files: 2026.02.14 15:57:28 2026.02.14 15:57:28 File: FMP24.exe PASS 2026.02.14 15:57:28 File: FMPA.exe PASS 2026.02.14 15:57:28 File: FMPP.exe PASS 2026.02.14 15:57:28 File: FMP-Map.exe PASS 2026.02.14 15:57:28 File: LRRP.exe PASS 2026.02.14 15:57:28 File: Survey.exe PASS 2026.02.14 15:57:28 File: airspy.dll PASS 2026.02.14 15:57:28 File: lame_enc.dll PASS 2026.02.14 15:57:28 File: libfftw3f-3.dll PASS 2026.02.14 15:57:28 File: libusb-1.0.dll PASS 2026.02.14 15:57:28 File: msvcr90.dll PASS 2026.02.14 15:57:28 File: msvcr100.dll PASS 2026.02.14 15:57:28 File: msvcrt.dll PASS 2026.02.14 15:57:28 File: pthreadVCE2.dll PASS 2026.02.14 15:57:28 File: rtlsdr.dll PASS 2026.02.14 15:57:28 File: rtlsdr_FC0012.dll PASS 2026.02.14 15:57:28 File: rtlsdr_V4.dll PASS 2026.02.14 15:57:28 File: sdrplay_api.dll PASS 2026.02.14 15:57:28 2026.02.14 15:57:28 18 files checked 2026.02.14 15:57:28 18 files passed 2026.02.14 15:57:28 2026.02.14 15:57:28 Base files test: All files passed 2026.02.14 15:57:28 P25 data loaded; 0 networks, 0 sites, 0 channels 2026.02.14 15:57:28 0 frequency records loaded 2026.02.14 15:57:28 0 network records loaded 2026.02.14 15:57:28 0 site records loaded 2026.02.14 15:57:28 0 radio records loaded 2026.02.14 15:57:28 0 group records loaded 2026.02.14 15:57:28 Fusion decoding enabled 2026.02.14 15:57:28 D-STAR decoding enabled 2026.02.14 15:57:28 NXDN4800 decoding enabled 2026.02.14 15:57:28 NXDN9600 decoding enabled 2026.02.14 15:57:28 DMR/MotoTRBO decoding enabled 2026.02.14 15:57:28 P25 Phase 1 and Phase 2 decoding enabled 2026.02.14 15:57:28 X2-TDMA decoding enabled 2026.02.14 15:57:28 ProVoice decoding enabled Mono audio decoding initiated... 2026.02.14 15:57:28 Initiating TCP connection to 127.0.0.1:20001... 2026.02.14 15:57:28 Connected to 127.0.0.1:20001 2026.02.14 15:57:28 0 site loader records loaded 2026.02.14 15:57:28 TCP link established 2026.02.14 15:57:28 TCP protocol error / incompatible DSD+/FMPx versions 2026.02.14 15:57:31 Initiating TCP connection to 127.0.0.1:20001... 2026.02.14 15:57:31 Connected to 127.0.0.1:20001 2026.02.14 15:57:31 TCP link established 2026.02.14 15:57:31 TCP protocol error / incompatible DSD+/FMPx versions 2026.02.14 15:57:34 Initiating TCP connection to 127.0.0.1:20001... 2026.02.14 15:57:34 Connected to 127.0.0.1:20001 2026.02.14 15:57:34 TCP link established 2026.02.14 15:57:34 TCP protocol error / incompatible DSD+/FMPx versions 2026.02.14 15:57:37 Initiating TCP connection to 127.0.0.1:20001... 2026.02.14 15:57:37 Connected to 127.0.0.1:20001 2026.02.14 15:57:37 TCP link established 2026.02.14 15:57:37 TCP protocol error / incompatible DSD+/FMPx versions

 

[rbrtklamp2]

What kind of SDR are you using and what FMPxx file are you using to to try and start decoding ?

 

[morfis]

'Airspy' is hardware and you can't set a tcp port in that - do you mean setting a tcp port in SDRsharp?

Either way, the best way to use DSD is to use FMPx (which version will depend on your rtl device hardware type) to control the receiver ...and that is what DSD is expecting to see.

Numerous posts on here about this already.