Applies To:
  • CitectSCADA 6.xx, 7.0
  • CitectHMI 6.xx, 7.0

If you call some Cicode that uses the ComOpen() function to open a port, then immediately shutdown without closing the port. a CitectSCADA exception report is generated.

This issue arises because the Citect module used for manipulating the port has been unloaded prematurely as CitectSCADA is shutting down.

Citect has confirmed this to be a problem in CitectHMI/SCADA versions 6.00 to 6.10A. This problem has been fixed in version 6.10B and 7.00.


ComClose port exception