Hitachi HT-4139-28 Developer's Manual page 46

A p p e n d i x
A-1 MSG_XFERREADY at Image Scanning
This TWAIN driver will issue MSG_XFERREADY when an application requires
DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDS and will be ready status.
It will issue MSG_CLOSEDSREQ if an error happens and will not be ready status.
Depending an application, after issuing
DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDS it would receive
MSG_XFERREADY only. As MSG_CLOSEDSREQ will be ignored, operation cannot be
continued.
In these cases, set an option that forced to issue MSG_XFERREADY even error status.
A p p e n d i x
This option is common to whole systems. (It can not be set for each application, user
individually.)
When you set the option, ensure if an error occurs after receipt of MSG_XFERREADY.
MSG_XFERREADY will be issued even in Not-ready, operation after that can not be performed.
Set information of this option in registry.
Key :HKEY_LOCAL_MACHINE
subkey :SOFTWARE¥HITACHI¥SOFTOCR¥CurrentVersion¥TWAIN¥FORCEREADY
name of the value :No Name
type code :REG_SZ
data :YES or NO （case-sensitive）
Default:NO
CAUTION
In registry, important information for computer hardware and software to operate system are
stored.
If there were an error in the registry, computer would be unstable or would not work.
Before you edit the registry be sure to back up it.
A-1