Applies To:
  • CitectSCADA 5.41 Service Pack A, 5.41 Service Pack B, 5.42, 5.42 Service Pack A, 5.50, 5.50 Service Pack A, 5.50 Service Pack B, 5.50 Service Pack C, 6.00, 6.00 Service Pack A
Summary:
When using Drivertrace, CitectSCADA may GPF.
 

Solution:
The problem could occur if too many driver buffer elements are displayed at a time when driver tracing is activated. These are controlled by the INI parameter [Debug]DrivertraceElements. This parameter is used to limit the printouts for drivers with large blocking values. The default value is 256 bytes.

Under normal circumstances the default Drivertrace value will be OK, however it has been found that a problem can occur where 256 bytes (2048 bits) is exceeded and a crash may then result. Reducing the INI parameter may avoid the crash.

E.g.

[Debug]
DriverTraceElements=64

Drivertraces should be monitored to see if any invalid unitcount values can be seen after this change.

Citect has confirmed this to be a problem in CitectHMI/SCADA version 5.41 Service Pack A to 6.00. We are researching this problem and will post new information here as it becomes available.
 
Keywords:
GPF, DCB  

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