can't get proper output from "Read Trace"

[stephen s]

I am trying to extract data specific to a particular experiment for further study. I have created (in addition to the other channels of digital/analog I/O) a virtual tag called "Experimental_title". Immediately before I perform a particular experiment, I change the value of "Experimental_title" to reflect the actual experiment title in my logbook (e.g. 20040525.1) Immediately after the experiment I change the value to another value.

I want to extract all values of "Experimental_title" in my DSC database so that I can search for the exact title that I want. After this, I will determine the exact time frame of the experiment and extract that data.

I am having trouble with the "Read Trace" subVI. It is not showing any o
utput on the Historical trace wire. I expect the subVI to return an array of all historical values of "Experimental_title", but instead it returns nothing. What am I doing wrong??

Thank you,

[ThomasD]

Hello,
I tried to open your VI but the "global variables.vi" does miss. Can you post it here?

Regards
Thomas D.
NI Germany
(SRQ 203124)

[stephen s]

My mistake. The Global variable "Path to configuration file" points to "D:\data\configured.scf". I set that as a constant in the original vi now, so that it is more self-contained now.