Applies To:
  • CitectSCADA 5.xx, 6.xx, 7.xx

I have enabled ABCLX logging via the [ABCLX]DebugLevel and [ABCLX]DebugCategory citect.ini parameters for diagnostic purposes and have managed to get communications via this driver to work successfully in CitectSCADA. However, I am still seeing the following warning in the ABCLX log file on start-up:

[WARN ] [TAG ] [0x00000414] [17/05/2008] [23:56:19.125] [CiVariableDatabase::InitialiseThreadProc()]  CTAPI could not be opened, sleeping for 5 seconds before retrying

What does this mean?


The ABCLX driver utilises the CtAPI for some of its operations and therefore requests a connection on start-up. The warnings that you are seeing may not necessarily a problem as it may just a timing issue where the ABCLX driver is requesting a connecting via the CtAPI before it has been initialised. It is very common to see some systems exhibit this behaviour and some not. If you are not experiencing any problems with communications to your PLCs via ABCLX then it is safe to ignore these warnings.