Applies To:
  • CitectSCADA 5.20, 5.21, 5.21 Service Pack A, 5.21 Service Pack B
Summary:
Cicode function CTAPITrend() will return no sample if any two tags specified in the arguments has that the first 10 characters of the tag name are the same. 

Solution:
CIT has confirmed this to be a problem in Citect for Windows versions 5.20 to 5.21 Service Pack C. This problem has been fixed in version 5.21 Service Pack D.

You may also work around the problem by only specifying trend tags in CTAPITrend(), where the first 10 characters of the tag name are unique.

 
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