It is important that only 32bit TWAIN drivers are used for scanning functions that are initiated from the Incisive application.
Fujitsu have both 64bit and 32bit TWAIN drivers. Don't use the TWAIN x64 driver.
Download Fujitsu TWAIN drivers
Choose the correct TWAIN driver for your Fujitsu/Ricoh scanner from this site: https://www.pfu.ricoh.com/global/scanners/fi/dl/
For the fi-7160, the latest 32bit Fujitsu TWAIN driver (3.30.0) is available from the following link: https://www.pfu.ricoh.com/global/scanners/fi/dl/setup/psip-twain32-3300.html
An earlier version (1.42.0c) of the driver is available from: https://www.pfu.ricoh.com/global/scanners/fi/support/software/fi6x30-fi6x40-ps-ip-twain32.html
Update Firmware
On the same page as the TWAIN driver download, will be a link to get the latest firmware for the scanner.
Test scanning outside of the Incisive application
To test the driver outside of the Incisive application, you can run a file called TwainSPM.exe (found in the \SPMwin or installation directory) and it will initiate a small scanning app that is using the TWAIN driver.
Do not rely on a test that uses the Scanner's own scanning software, as they will usually communicate using their own direct protocols and not rely on the TWAIN driver.