Advantech AE Technical Share Document Date Category Abstract Keyword Related Product 2015 / 04 / 08 SR# ■ FAQ □ SOP Related OS How can we know which control file are use. Serial Number/Control file. N/A Problem Description: How can we know which control file are use. Brief Solution - Step by Step: Microsoft Windows7 %TSERIALNUM will display the current control file. Reference: 1. WebAccess User Manual 4.9.3.38 Page 1