Fujitsu fi-5900C Operator's Manual page 122

■ Before Using This Function
Configure the following settings before using this function:
1. When the TWAIN driver is used, select [Use Memory on Scanner] or [Use
both Memory] as [Cache Mode] on the [Job/Cache] tab of the "Option"
dialog box. Otherwise you can not continue scanning after a multifeed
error.
2. When ISIS or the TWAIN driver is used, if you want to start scanning by
using the [Scan] button after a multifeed error, configure the driver
settings as described below.
[TWAIN driver] Mark the [Enable Scanner Panel] and "Enable [Scan] Button" checkboxes on the [Startup]
tab of the "Option" dialog box.
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3.12 Not detecting Multifeed for fixed format