Sigma updated sd Quattro camera firmware to version 1.11 and sd Quattro H to version 1.07. Both updates fix X3F and X3I file errors.

The main changes made by the firmware 1.11 i 1.07
Fixes a phenomenon in which X3F files extracted from X3I files can not be edited a second time if the data is corrected and saved to files using SIGMA Photo Pro.
Availability
The firmware is available for download on the Sigma website under Downloads.
Firmware version 1.11 for sd Quattro – download
Firmware version 1.07 for sd Quattro H – Download