File name was being rejected.
KB-20191022-01
Version
XFRX 19.0
Symptoms
Return value of SetParams() is -19, error mesage is "File name (%1) not is valid.".
Cause
The file name starts with windows reserved file such as CON, PRN, AUX, NUL, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, LPT9.
Workaround
Add some character(s) at the beginning of the file name.