Canon S400 Reference Manual page 233

Cannot transfer to TWAIN-compatible graphics application
program
Check
Does the TWAIN-compatible graphics application program you are using
support the file format type and resolution of the image data?
Some TWAIN-compatible graphics application programs support specific
file format types and resolution settings only. For example, the resolution
settings of some OCR (optical character reader) application programs are
limited to 300 to 400dpi.
Check the file format types and resolution settings of the TWAIN-compati-
ble graphics application program first, and then scan and transfer the image
again.
Troubleshooting - Cannot be used with TWAIN-compatible application program 233