Applies To:
  • CitectSCADA 5.41
  • CitectHMI 5.41

After an update from an older Citect for Windows version I get the following compile error "Bad IO Device variable".

In my project I used the MELSEC protocol.


There was an incorrect entry in the Melsec.dbf file. Copy the Melsec.dbf from Citect V5.40 to your version 5.41. You can find the Melsec.dbf file in the Citect\BIN folder.

A full driverpack for the Melsec driver is also available from the Support section of the Citect web site.