Task failed successfully *Windows XP sound*

[0x5ECF4ULT]

While the title is just a bad pun, the problem is an error which throws successfully. I already searched the internet. The only thing I found was another issue which didn't have an answer (but was closed).
So here is my output:

ISO/IEC 14443A (106 kbps) target:
    ATQA (SENS_RES): 00  02  
* UID size: single
* bit frame anticollision supported
       UID (NFCID1): ## ## ## ##    <-- censored
      SAK (SEL_RES): 38  
* Compliant with ISO/IEC 14443-4
* Not compliant with ISO/IEC 18092
                ATS: 78  80  70  02  45  50  41  00  00  00  00  70  97  07  57  00  00  01  2c  
* Max Frame Size accepted by PICC: 256 bytes
* Bit Rate Capability:
  * Same bitrate in both directions mandatory
* Frame Waiting Time: 38.66 ms
* No Start-up Frame Guard Time required
* Node Address not supported
* Card IDentifier supported
* Historical bytes Tk: 45  50  41  00  00  00  00  70  97  07  57  00  00  01  2c  
  * Proprietary format

Fingerprinting based on MIFARE type Identification Procedure:
* SmartMX with MIFARE 4K emulation
Other possible matches based on ATQA & SAK values:
* MFC 4K emulated by Nokia 6212 Classic

Try to authenticate to all sectors with default keys...
Symbols: '.' no key found, '/' A key found, '\' B key found, 'x' both keys found
[Key: ffffffffffff] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: a0a1a2a3a4a5] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: d3f7d3f7d3f7] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: 000000000000] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: b0b1b2b3b4b5] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: 4d3a99c351dd] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: 1a982c7e459a] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: aabbccddeeff] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: 714c5c886e97] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: 587ee5f9350f] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: a0478cc39091] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: 533cb6c723f6] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
[Key: 8fd0a4f256e9] -> [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]

Sector 00 -  FOUND_KEY   [A]  Sector 00 -  FOUND_KEY   [B]  
Sector 01 -  FOUND_KEY   [A]  Sector 01 -  FOUND_KEY   [B]  
Sector 02 -  FOUND_KEY   [A]  Sector 02 -  FOUND_KEY   [B]  
Sector 03 -  FOUND_KEY   [A]  Sector 03 -  FOUND_KEY   [B]  
Sector 04 -  FOUND_KEY   [A]  Sector 04 -  FOUND_KEY   [B]  
Sector 05 -  FOUND_KEY   [A]  Sector 05 -  FOUND_KEY   [B]  
Sector 06 -  FOUND_KEY   [A]  Sector 06 -  FOUND_KEY   [B]  
Sector 07 -  FOUND_KEY   [A]  Sector 07 -  FOUND_KEY   [B]  
Sector 08 -  FOUND_KEY   [A]  Sector 08 -  FOUND_KEY   [B]  
Sector 09 -  FOUND_KEY   [A]  Sector 09 -  FOUND_KEY   [B]  
Sector 10 -  FOUND_KEY   [A]  Sector 10 -  FOUND_KEY   [B]  
Sector 11 -  FOUND_KEY   [A]  Sector 11 -  FOUND_KEY   [B]  
Sector 12 -  FOUND_KEY   [A]  Sector 12 -  FOUND_KEY   [B]  
Sector 13 -  FOUND_KEY   [A]  Sector 13 -  FOUND_KEY   [B]  
Sector 14 -  FOUND_KEY   [A]  Sector 14 -  FOUND_KEY   [B]  
Sector 15 -  FOUND_KEY   [A]  Sector 15 -  FOUND_KEY   [B]  
Sector 16 -  FOUND_KEY   [A]  Sector 16 -  FOUND_KEY   [B]  
Sector 17 -  FOUND_KEY   [A]  Sector 17 -  FOUND_KEY   [B]  
Sector 18 -  FOUND_KEY   [A]  Sector 18 -  FOUND_KEY   [B]  
Sector 19 -  FOUND_KEY   [A]  Sector 19 -  FOUND_KEY   [B]  
Sector 20 -  FOUND_KEY   [A]  Sector 20 -  FOUND_KEY   [B]  
Sector 21 -  FOUND_KEY   [A]  Sector 21 -  FOUND_KEY   [B]  
Sector 22 -  FOUND_KEY   [A]  Sector 22 -  FOUND_KEY   [B]  
Sector 23 -  FOUND_KEY   [A]  Sector 23 -  FOUND_KEY   [B]  
Sector 24 -  FOUND_KEY   [A]  Sector 24 -  FOUND_KEY   [B]  
Sector 25 -  FOUND_KEY   [A]  Sector 25 -  FOUND_KEY   [B]  
Sector 26 -  FOUND_KEY   [A]  Sector 26 -  FOUND_KEY   [B]  
Sector 27 -  FOUND_KEY   [A]  Sector 27 -  FOUND_KEY   [B]  
Sector 28 -  FOUND_KEY   [A]  Sector 28 -  FOUND_KEY   [B]  
Sector 29 -  FOUND_KEY   [A]  Sector 29 -  FOUND_KEY   [B]  
Sector 30 -  FOUND_KEY   [A]  Sector 30 -  FOUND_KEY   [B]  
Sector 31 -  FOUND_KEY   [A]  Sector 31 -  FOUND_KEY   [B]  
Sector 32 -  FOUND_KEY   [A]  Sector 32 -  FOUND_KEY   [B]  
Sector 33 -  FOUND_KEY   [A]  Sector 33 -  FOUND_KEY   [B]  
Sector 34 -  FOUND_KEY   [A]  Sector 34 -  FOUND_KEY   [B]  
Sector 35 -  FOUND_KEY   [A]  Sector 35 -  FOUND_KEY   [B]  
Sector 36 -  FOUND_KEY   [A]  Sector 36 -  FOUND_KEY   [B]  
Sector 37 -  FOUND_KEY   [A]  Sector 37 -  FOUND_KEY   [B]  
Sector 38 -  FOUND_KEY   [A]  Sector 38 -  FOUND_KEY   [B]  
Sector 39 -  FOUND_KEY   [A]  Sector 39 -  FOUND_KEY   [B]  

We have all sectors encrypted with the default keys..

Auth with all sectors succeeded, dumping keys to a file!
nfc_initiator_mifare_cmd: Success    <-- task failed "successfully"

At first this looks very promising but in fact there is an error. I did try to map the contents with the help of "Mifare Classic Tool" which actually suceeded in decrypting a few sectors.
Now the question: How can MFOC tell me that all sectors got the default keys, when MCT uses the same list and tells me that a few sectors could not be decrypted?

Okay I checked the source code... It seems like the error is thrown in line 476 in mfoc.c but I don't know how the "Success" came here.
Maybe it helps: this card is a smartcard with the "atrust-acos" OS

[xavave]

I've emulated a MIFARE SMART 4K tag using command proxmark3> hf mf sim *4 u 1FCE788E
then I've put my ACR122U on the proxmark and ran mfoc in debug mode in visual studio and could reproduce a maybe similar issue:

I think the error is in this part of code ..
I tried to comment in code all gotoerror from line 663 to 712 when code reaches the error at "nfc_initiator_mifare_cmd"

and the tag dump was saved (good 4K size) but it was just full of 00 :-/
My knowledge isn't good enough to understand why it fails now

proxmark3 emulating a 4K card and ACR122U reading:

[xavave]

@tacticalDevC as your error indicates "success" maybe you can try to comment this code in mfoc.c
--> //nfc_perror(r.pdi, "nfc_initiator_mifare_cmd");
//goto error;

and then recompile mfoc

[0x5ECF4ULT]

Thanks I'll try