"Cannot open file "xx.krz". The device is not ready."
This message appears if the desired cross stitch design (.krz) file is not where the module expects it to be. For example, if a design was loaded into the program from a USB memory stick, then closed and the memory stick removed. The message would appear if you tried to load the design from the recent files list on the File menu.
"No valid cross stitch data (Unknown file format)."
This message appears if the file you are attempting to load is corrupt. For example, it might have a .krz extension, yet not be a proper cross stitch design file.