Handling Errors

General failure

• Symptom

When you try scanning an image with Dynamic Web TWAIN, you may receive the error message “General failure” in the ErrorString property.

• Cause

The problem occurs when the source (scanner) is not disabled completely after a scanning session or the source is currently unavailable.

• Resolution

You can set IfDisableSourceAfterAcquire to true . It must be set before the call to SelectSource

function AcquireImage() {
    DWObject.IfDisableSourceAfterAcquire = true;
    DWObject.SelectSource();
    DWObject.OpenSource();
    DWObject.AcquireImage();
}