@ cemale*****,
According to the log file you have posted, more likely that the connection between phone and software is not stable.
Please make sure that:
- You use the latest version of Sigma software
- Battery is fully charged
- All the side programs, that may interfere with the phone, are closed
- Phone’s cable and device itself should not be disconnected or disturbed until the procedure is fully completed
- Connect phone to USB port placed on the backside of PC (motherboard's USB port)
- Do not connect or disconnect other USB cables into the PC during the actual work with the phone
- Avoid using any kind of USB HUBs and long USB cables. Use the shortest-length USB cable available.
- Phone has stock (factory) firmware version
- SIM card is removed
- After that repeat operation once again
Best Regards
GSMServer team 