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FAQ X-PROG XPROG M V5.55 ECU Chip Tuning Tool

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XPROG-M V5.55 XPROG M Programmer with USB Dongle Especially for BMW CAS4 Decryption

XPROG-M V5.55 XPROG M Programmer with USB Dongle Especially for BMW CAS4 Decryption   Item No. SM48-B

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XPROG-M V5.55 XPROG M Programmer with USB Dongle
1. No operation system limitation, software can be installed on Windows XP, 7
2. This is the only version XPROG-M can decypte new version BMW CAS4.
3. Add new authorization: AUTH-0025 Authorized 11/4/2014


FAQ X-PROG XPROG M V5.55 ECU Chip Tuning Tool


Here are the Xprog M V5.55 ECU programmer error solutions that users often encounter.


Errors included:


– Certificate expired and needs to be updated,or validated

– Can not find the key

– Access violation at address 1283DF84 in module “argen.dll”. Read of address 7A2BFC7A.

– Unknown command: Software error

Xprog-box v5.55 Safengine error



3 possible reasons & solutions:

-the USB cable problem and need to replace

-my computer is not compatible with Xprog-M, better download and install their Ghost Windows Xp Professional Sp3, download link

-If Xprog V5.48 still fails to read, then update Xprog 5.48 to higher version V5.0/V5.50/V5.55 or read it with Xhorse VVDI PROG programmer (this is the ideal ECU programmer for CAS4)


XPROG-M V5.50 error: “Certificate expired and needs to be updated,or validated”


Found solution to Chinese Xprog v5.55 (update with ATMEGA64 Repair Chip)
Dongle(key) should have 2(two) instances in device manager (HID-compliant device and USB human interface)
No virtual ET199,no several HID-compliant—just those two I listed. And it works properly then.



XPROG 5.55 error message “Can not find the key!”


do you connect usb dongle first.when you connect dongle (after complet install xprog 5.55 software and driver for sure)the led into dongle light windows make drivers install for this dongle when it finish the led into dongle blinking then connect the xprog 5.55 to usb.Ive installed into a windows 7, no problem.


XPROG 5.5.5 error message: Xprogdesktop: Access violation at address 1283DF84 in module “argen.dll”. Read of address 7A2BFC7A.


Change another laptop and re-install V5.5.5 X-prog box software.
Recommend operating system: Win XP and Win 7


XPROG-M error massage: Unknown command: Software error



ATMEGA64 CPU  repair chip can help to fix this hardware problem. only need replace the XPROG-M V5.50 old CPU chip with the New CPU chip, then done!


Xprog-M v5.55 Safengine error

When i installed Xprog M V5.55 software, the Safengine error □□□□□□□□ popped up


Solved by professional technicians!


Open Computer Management and the find out ET199 to uninstall it

(there should be lots of ET199, uninstall all)


Restart the computer

Install the patch file in the CD

Then Xprog-m 5.55 would work fine, usually.

If it still not work, please contact our customer service to send you our Windows XP operating system.

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