Applies To:
  • CitectSCADA 5.xx
  • CitectHMI 5.xx
Summary:
The FileExist() cicode function may cause CitectSCADA to temporarily hang if the file we are looking for is on a network drive that is currently unreachable. 

Solution:
There is no way to prevent this from occurring in older builds of CitectSCADA. While CitectSCADA is hung all processing will cease to continue, i.e. I/O, trends, alarms, graphics etc. Tests have shown the duration of the hang to vary from 2 - 20 seconds depending on the network.

The FileExist() function has been modified to ensure that it no longer blocks the main Citect thread when looking for a file.

Citect has confirmed this to be a problem in CitectHMI/SCADA version 5.00 to v5.42. This bug has been fixed in version 5.5 of CitectSCADA.

 
Keywords:
Hang FileExist  

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