i am checking the original file and it passes, then when i alter even only  the rev limiter it fails to correct the sums, this is my second car (i have one s3 - and i had no problems for tunning almost everything on her) now i am trying to do it to my brothers car, and i fail checksumming.

I've read it, and tryed to checksum in cmd, and with ME7Correction (V160306) it just crashes even if i alter only Nmax table or any table alone it says :

Is it bad because of my tune? Or because it didnt download correctly. I tuned my other car  with no problem at all. I really cant figure it out why it is bigger, how to correct file size

yep i tried ori file - it passes checksums i am sory for the screenshot. I dont know what PN stands for...sory for that
here is the ori file.
and here is the text
I am really gratefull for your answers


Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.

C:\Users\Aleksander>me7sum ivchos3stage1.bin ivchos3stage1.bin
ME7Sum (v1.0.5) [Management tool for Bosch ME7.x firmwares]
Inspiration from Andy Whittaker's tools and information.
Written by 360trev and nyet [BSD License Open Source].

Attempting to open firmware file 'ivchos3stage1.bin'

Step #1: Reading ROM info ..
 Searching for EPK signature...OK
 Searching for ECUID table...OK
 EPK         : '42/1/ME7.5/5/4018.20//F19x6/Dst02o/101299/'
 Part Number : '8L0906018N  '
 Engine ID   : '1.8L R4/5VT         '
 SW Version  : '0002'
 HW Number   : '0261206796'
 SW Number   : '1037354092'

Step #2: Reading ROMSYS ..
 Startup section: word[0x008000]+word[0x00FFFE]
 @08038 Add=0x0000FC75 CalcAdd=0x0000FC75  ADD OK
 All param page: word[0x010000]+word[0x01FFFE]
 @01ab0c Add=0x00971D CalcAdd=0x00971D  ADD OK

Step #3: Reading RSA signatures ..
 Searching for RSA offset #0...missing
 Searching for RSA offset #1...missing

Step #4: Finding CRC table(s) ..
 Searching for CRC table(s)...OK
 CRC table(s) OK

Step #5: Reading Main Data Checksums ..
 Searching for main data CRC pre block...missing
 Searching for main data CRC/csum blocks...FAIL
 Searching for main data CRC offsets...missing
 Searching for main data checksum offsets...missing
Step #5: ERROR! Skipping Main Data checksums ... UNDEFINED

Step #6: ROMSYS Program Pages
 Program pages: 8k page first+last in 0x0000-0xFFFF and 0x20000-0xFFFFF
 @00803c Add=0x7D4EC6 CalcAdd=0x3A8D4D ** FIXED **

Step #7: Reading Main Program Checksums ..
 Searching for main program checksum..FAIL
Step #7: ERROR! Skipping Main Program Checksums.. UNDEFINED

Step #8: Reading Multipoint Checksum Blocks ..
 Searching for multipoint block descriptor #1...missing
 Searching for multipoint block descriptor #2...FAIL
Step #8: ERROR! Skipping Multipoint Checksum Block... UNDEFINED

Step #9: Looking for rechecks ..

*** Found 3 checksums in ivchos3stage1.bin

*** ABORTING! 3 uncorrectable error(s) in ivchos3stage1.bin! ***

C:\Users\Aleksander>^

first wrote file bad size not good but searching the error
not use china mpps 13 and search original file and you are see the probelm, i hope  ....

And here's the corrected stage 1...


Ferrari 360 ME7.3 Rom Tool. *BETA TEST Last Built: Nov  6 2019 07:49:40 v1.71
by 360trev.  Needle lookup function borrowed from nyet (Thanks man!) from
the ME7sum tool development (see github).

..Now fixed and working on 64-bit hosts, Linux, Apple and Android devices

þ Opening 'c:\Users\hp\Downloads\ivchos3stage1.bin' file
Succeded loading file.

Loaded ROM: Tool in 1Mb Mode

-[ DPPx Setup Analysis ]-----------------------------------------------------------------

>>> Scanning for Main ROM DPPx setup #1 [to extract dpp0, dpp1, dpp2, dpp3 from rom]

main rom dppX byte sequence #1 found at offset=0x64a6.

dpp0: (seg: 0x0000 phy:0x00000000)
dpp1: (seg: 0x0205 phy:0x00814000)
dpp2: (seg: 0x00e0 phy:0x00380000) ram start address
dpp3: (seg: 0x0003 phy:0x0000c000) cpu registers

Note: dpp3 is always 3, otherwise accessing CPU register area not possible

-[ Basic Firmware information ]-----------------------------------------------------------------

>>> Scanning for ROM String Table Byte Sequence #1 [info]

found needle at offset=0x21672
found table at offset=00019EAE.

Idx=2   { 0261206796              } 0x144d6 : SSECUHN [Bosch Hardware Number]
Idx=4   { 1037354092              } 0x144e0 : SSECUSN [Bosch Serial Number]
Idx=10  { 8L0906018N              } 0x15344 : DIF
Idx=11  { 0002                    } 0x15364 : BRIF
Idx=19  { 1.8L R4/5VT             } 0x15350 : OTHERID

>>> Scanning for EPK information [info]

found needle at offset=0x27030.
EPK: @ 0x1432b { /1/ME7.5/5/4018.20//F19x6/Dst02o/101299/ }
-[ CRC32_ChecksumCalc ]---------------------------------------------------------------------

>>> Scanning for Main ROM : [Stored Shadow Checksums]
Shadow not found
>>> Scanning for CRC32_ChecksumCalc() Variant #1 [calculates crc32 polynomial table]
Found at offset=0x68072. CRC32 Polynomial Table located at: 0x0081c6b4 file offset: 0001c6b4

-[ Main-Rom Checksum Analysis ]----------------------------------------------------------

>>> Scanning for Main ROM Checksum sub-routine #1 [to extract number of entries in table]
main checksum byte sequence #1 found at offset=0x67b9c.
Found #2 Regional Block Entries in table

>>> Scanning for Main ROM Checksum sub-routine #2 [to extract Start/End regions]
main checksum byte sequence #2 found at offset=0x67b60.

>>> Main Region Block #1:
   lo:0x1bfd8.W hi:0x1bfda.W (seg: 0x206 phy:0x81bfd8) :
    Start Addr : 0x00000000
   lo:0x1bfdc.W hi:0x1bfde.W (seg: 0x206 phy:0x81bfdc) :  End Addr   : 0x0000fbff
    sum=47ecee0d ~sum=b81311f2 : acc_sum=0
>>> Main Region Block #2:
   lo:0x1bfe0.W hi:0x1bfe2.W (seg: 0x206 phy:0x81bfe0) :
    Start Addr : 0x00020000
   lo:0x1bfe4.W hi:0x1bfe6.W (seg: 0x206 phy:0x81bfe4) :  End Addr   : 0x0007ffff
    sum=aa273ff1 ~sum=55d8c00e : acc_sum=47ecee0d

Final Main ROM Checksum calculation:  0xf2142dfe (after 2 rounds)
Final Main ROM Checksum calculation: ~0x0debd201


>>> Scanning for Main ROM Checksum sub-routine #3 variant #A [to extract stored checksums and locations in ROM]
main checksum byte sequence #3 block found at > offset=00067C08.
MAIN STORED ROM  CHECKSUM: 0xf2142dfe (calc) ? 0xf2142dfe (stored) : OK!    ~CHECKSUM: 0x0debd201 ? 0x0debd201 : OK!


-[ Multipoint Checksum Analysis ]--------------------------------------------------------

>>> Scanning for Multipoint Checksum sub-routine #1 Variant A [to extract number entries in stored checksum list in ROM]

>>> Scanning for Multipoint Checksum sub-routine #1 Variant B [to extract number entries in stored checksum list in ROM]
Found at offset=0x69d6a.
Found #34 Multipoint Entries in table

>>> Scanning for Multipoint Checksum sub-routine #2 Variant A [to extract address of stored checksum list location in ROM]

>>> Scanning for Multipoint Checksum sub-routine #2 Variant B [to extract address of stored checksum list location in ROM]
Found at offset=0x69fa0.
***Experimental***: Note Variant #B has 2 crc32's in the table before the multipoints. Skipping the CRC's and just doing the multipoints..

Multipoint Block #01 of #32:
   lo:0x1fc20.W hi:0x1fc22.W (seg: 0x207 phy:0x81fc20) :
    Start:   seg:0x200 phy:0x00800000 (offset: 0x00000000)
   lo:0x1fc24.W hi:0x1fc26.W (seg: 0x207 phy:0x81fc24) :
    End:     seg:0x200 phy:0x00803fff (offset: 0x00003fff)
    Block Checksum: 0x0fa0f5cf :  Calculated: 0x0fa0f5cf OK
   ~Block Checksum: 0xf05f0a30 : ~Calculated: 0xf05f0a30 OK
Multipoint Block #02 of #32:
   lo:0x1fc30.W hi:0x1fc32.W (seg: 0x207 phy:0x81fc30) :
    Start:   seg:0x201 phy:0x00804000 (offset: 0x00004000)
   lo:0x1fc34.W hi:0x1fc36.W (seg: 0x207 phy:0x81fc34) :
    End:     seg:0x201 phy:0x00807fff (offset: 0x00007fff)
    Block Checksum: 0x0f4716b3 :  Calculated: 0x0f4716b3 OK
   ~Block Checksum: 0xf0b8e94c : ~Calculated: 0xf0b8e94c OK
Multipoint Block #03 of #32:
   lo:0x1fc40.W hi:0x1fc42.W (seg: 0x207 phy:0x81fc40) :
    Start:   seg:0x202 phy:0x00808000 (offset: 0x00008000)
   lo:0x1fc44.W hi:0x1fc46.W (seg: 0x207 phy:0x81fc44) :
    End:     seg:0x202 phy:0x0080bfff (offset: 0x0000bfff)
    Block Checksum: 0x10b3d1d5 :  Calculated: 0x10b3d1d5 OK
   ~Block Checksum: 0xef4c2e2a : ~Calculated: 0xef4c2e2a OK
Multipoint Block #04 of #32:
   lo:0x1fc50.W hi:0x1fc52.W (seg: 0x207 phy:0x81fc50) :
    Start:   seg:0x203 phy:0x0080c000 (offset: 0x0000c000)
   lo:0x1fc54.W hi:0x1fc56.W (seg: 0x207 phy:0x81fc54) :
    End:     seg:0x203 phy:0x0080fbff (offset: 0x0000fbff)
    Block Checksum: 0x18510fb6 :  Calculated: 0x18510fb6 OK
   ~Block Checksum: 0xe7aef049 : ~Calculated: 0xe7aef049 OK
Multipoint Block #05 of #32:
   lo:0x1fc60.W hi:0x1fc62.W (seg: 0x207 phy:0x81fc60) :
    Start:   seg:0x204 phy:0x00810000 (offset: 0x00010000)
   lo:0x1fc64.W hi:0x1fc66.W (seg: 0x207 phy:0x81fc64) :
    End:     seg:0x204 phy:0x00813fff (offset: 0x00013fff)
    Block Checksum: 0x088e8a59 :  Calculated: 0x08a8d092 FIXED!
   ~Block Checksum: 0xf77175a6 : ~Calculated: 0xf7572f6d FIXED!
Multipoint Block #06 of #32:
   lo:0x1fc70.W hi:0x1fc72.W (seg: 0x207 phy:0x81fc70) :
    Start:   seg:0x205 phy:0x00814000 (offset: 0x00014000)
   lo:0x1fc74.W hi:0x1fc76.W (seg: 0x207 phy:0x81fc74) :
    End:     seg:0x205 phy:0x00817f67 (offset: 0x00017f67)
    Block Checksum: 0x0fdb8db6 :  Calculated: 0x0fdb8db6 OK
   ~Block Checksum: 0xf0247249 : ~Calculated: 0xf0247249 OK
Multipoint Block #07 of #32:
   lo:0x1fc80.W hi:0x1fc82.W (seg: 0x207 phy:0x81fc80) :
    Start:   seg:0x206 phy:0x00818190 (offset: 0x00018190)
   lo:0x1fc84.W hi:0x1fc86.W (seg: 0x207 phy:0x81fc84) :
    End:     seg:0x206 phy:0x0081bfff (offset: 0x0001bfff)
    Block Checksum: 0x05f7bc7b :  Calculated: 0x05f6f89a FIXED!
   ~Block Checksum: 0xfa084384 : ~Calculated: 0xfa090765 FIXED!
Multipoint Block #08 of #32:
   lo:0x1fc90.W hi:0x1fc92.W (seg: 0x207 phy:0x81fc90) :
    Start:   seg:0x207 phy:0x0081c000 (offset: 0x0001c000)
   lo:0x1fc94.W hi:0x1fc96.W (seg: 0x207 phy:0x81fc94) :
    End:     seg:0x207 phy:0x0081ffff (offset: 0x0001ffff)
    Block Checksum: 0x1b0e2590 :  Calculated: 0x1b0e63e6 FIXED!
   ~Block Checksum: 0xe4f1da6f : ~Calculated: 0xe4f19c19 FIXED!
Multipoint Block #09 of #32:
   lo:0x1fca0.W hi:0x1fca2.W (seg: 0x207 phy:0x81fca0) :
    Start:   seg:0x208 phy:0x00820000 (offset: 0x00020000)
   lo:0x1fca4.W hi:0x1fca6.W (seg: 0x207 phy:0x81fca4) :
    End:     seg:0x208 phy:0x00823fff (offset: 0x00023fff)
    Block Checksum: 0x13edc935 :  Calculated: 0x13edc935 OK
   ~Block Checksum: 0xec1236ca : ~Calculated: 0xec1236ca OK

... cut cut ... (to shorten message length)..

Multipoint Block #32 of #32:
   lo:0x1fe10.W hi:0x1fe12.W (seg: 0x207 phy:0x81fe10) :
    Start:   seg:0x21f phy:0x0087c000 (offset: 0x0007c000)
   lo:0x1fe14.W hi:0x1fe16.W (seg: 0x207 phy:0x81fe14) :
    End:     seg:0x21f phy:0x0087ffff (offset: 0x0007ffff)
    Block Checksum: 0x1ffde002 :  Calculated: 0x1ffde002 OK
   ~Block Checksum: 0xe0021ffd : ~Calculated: 0xe0021ffd OK

Total Multipoint Checksums Passed :  58 (~90%)
Total Multipoint Checksums Failed :   6 (~9%)
Total Multipoint Checksums Fixed  :   6 (~9%)


Attempting to save corrected rom to 'c:\Users\hp\Downloads\ivchos3stage1.bin_corrected.bin'...

Seems to find everything no problems and never any circular references. Check out the code its all on github.

Not finding, correcting. I haven't found circular references either, but i haven't found one order that always works.