When the Trend server creates the history
files, it also creates a directory of the files in a file called
<name>.HST, where name is the trend file name. This file
contains the time of each of the history files, as well as its full
path. This ensures the best performance to the trending system. If
you copy all the trend files to a new directory, the full paths in
the HST file will still point to the old directory, so the trending
system will not be able to find the files.
If you don't need the existing data in the trend files, just
delete all the trend files and the Trend server will re-create them
on startup. There is no support that allows you to move existing
trend files to another directory.
See Q2143 for updated information for
users of Citect 5.xx. |