clock.systemtimedrift!!!

[Matt Lenhart]

Hello,

The message you are receiving is more of a warning than an error
message, meaning that it will not actually affect the experiment or
any of the data collected. We have had a number of people report this
with E-Prime 2.0. This was originally put in for E-Prime 1.2 as an
advanced warning of timing problems, but it has unfortunately created
many false positives in E-Prime 2.0. In other words, it is very
unlikely that your machine is actually experiencing significant time
drift.

You can effectively eliminate this message by adding an InLine at the
very beginning of the SessionProc in your experiment and entering the
following line of script:

Clock.SystemTimeDriftThreshold = 50000

Alternatively, you can upgrade to E-Prime 2.0.8.22 via our web support
site (see link below). This is the newest version of E-Prime 2.0 and
should remove clock drift error.

Any time you suspect that your machine may have a timing issue, we
recommend running our RefreshClockTest (also available via the support
site), which will judge your machine's ability to collect millisecond-
precise data in its current running environment.

Please let me know if you have any further questions.

- Matt
PST Technical Consultant
http://www.pstnet.com/

On Sep 8, 2:50 pm, David McFarlane <mcfar... at msu.edu> wrote:
> Biometricassistant,
>
> >when using an experiment that was originally made for e-prime one i
> >get this error message.  It claims the data from this trial may be
> >unusable.  The experiment I'm having this problem with is a digitspan
> >experiment.  It says a number that is either 4, 7, or 10, digits.  The
> >participant is then asked to repeat it back to the experiment.  After
> >this has happened the experiment is then advanced.  This makes me
> >wonder if the timedrift problem has something to do with this
> >dependant timing.  Any Ideas?
>
> 1) Does the waring message actually say anything about "Clock.SystemTimeDrift"?
>
> 2) What revision of EP2 are you using?
>
> 3) For more info, you can go to the PST Forum and do a search on
> something like "systemtime" for discussion threads such as
> support.pstnet.com/forum/Topic735-12-1.aspx .
>
> -- David McFarlane, Professional Faultfinder
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