Applies To:
  • CitectSCADA 5.50, 5.50 Service Pack A, 5.50 Service Pack B, 5.50 Service Pack C, 6.00, 6.00 Service Pack A
  • CitectHMI 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:
I am using CitectSCADA version 6. When I use TrnAddHistory() to attach pre version 6 trend history files it returns a successful 0 but I cannot see anything in my trend display. 

Solution:
The header format of trend data files has changed slightly in version 6, where the log name field has increased in length.

Citect has confirmed this to be a problem in CitectHMI/SCADA version 6 and v6 SPK A. This has been resolved in CitectSCADA v6.1.

 
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