You can get the The CeiVS file by changing the registry key.
path:
HKEY_CURRENT_USER\Software\Canon Electronics
Inc.\CeiVScan\(CeiFolder)
The last folder in the path will differ depending on which Canon Transport you are using. If you are using a CR-135i/190i the last folder will be CeiVSBanya. If you are using a Canon CR-50/80 the last folder will be CeiVSEagle. If you are using a Canon CR-180 the last folder will be CeiVSCrop.
i.e for a Canon CR-50/80 the registry path would be:
HKEY_CURRENT_USER\Software\Canon Electronics
Inc.\CeiVScan\CeiVSEagle
Add the DWORD value that name is WriteLog, and change Data to 1.
If you change the registry the CeiVS.log file is created in tmp
folder(type '%temp%' in the my computer file explorer ).