problem with a summation object

[David McFarlane]

Max,

Hmm, another question that could go to PST Web Support at 
http://support.pstnet.com/e%2Dprime/support/login.asp .  Anyway, what 
was the exact line of code that produced the error?  Typically, an 
"Object does not have a default value" error occurs when you use an 
object but fail to specify which *property* of the object you 
mean.  You can get away with that only when the object does have a 
default property, otherwise you must explicitly specify which 
property you mean.

To take a contrived example, the following will create such an error:

     SummationRTA.AddObservation CInt(ReactionInterval)

whereas the following will not:

     SummationRTA.AddObservation CInt(ReactionInterval.RT)

-- David McFarlane


At 2/2/2012 06:02 AM Thursday, you wrote:
>Dear everyone,
>
>I tried to use a summation object to give feedback to experimental
>subjects about their accuracy and reaction times.
>I used following code:
>Dim SummationAccA, SummationAccB, SummationRTA, SummationRTB as
>Summation
>(global variables)
>
>Set SummationAccA = New Summation
>Set SummationRTA = New Summation
>Set SummationAccB = New Summation
>Set SummationRTB = New Summation
>(before running the list)
>
>SummationAccA.AddObservation ReactionInterval.ACC
>SummationRTA.AddObservation ReactionInterval.RT
>SummationAccB.AddObservation ReactionInterval2.ACC
>SummationRTB.AddObservation ReactionInterval2.RT
>(ReactionInterval & Reactioninterval2 are slide objects)
>
>By attempting to add the accuracies and reaction times following error
>occurs:
>"Object does not have a default value"
>
>I used the same principle in further experiments and there it worked.
>I hope there is just a simple mistake, thanks for answers,
>best regards,
>Max

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