Error Code number

TW_OK

Operation was successful.

0

TW_GENERAL_ERROR

General internal error.

1

TW_NOTOPEN

Could not find TWAIN driver or could not load DLL.

2

TW_TRANSFERFAILURE

Data transfer failure. Possibly not enough memory.

3

TW_OPENDSMFAILURE

Could not open Data Source Manager.

4

TW_COMPATIBLITY

The TWAIN driver version is not supported.

5

TW_OPENDSFAILURE

Could not open Data Source.

6

TW_CLOSEDSFAILURE

Could not close Data Source.

7

TW_SELECTDSFAILURE

Data Source selection by the Data Source Manager failed.

8

TW_INVALIDPARAMETER

Invalid function parameter.

9

TW_NOTTIFFDLL

The BiTiff.dll is missing.

10

TW_FILESAVEERROR

Error saving tiff image.

11

TW_NOTWAINDLL

Twain dll is missing.

12

TW_LOADED

Twain dll is already loaded.

13

TW_INVALIDPARAMETER

Parameter is invalid.

14

TW_NOTDLGDLL

BiDlgs32.dll is missing.

15

TW_SUPPORT_OPERATION

Operation is not supported.

16

TW_HWND_ERROR

Error createing window for getting event from data source.