Calling a VI By Reference

[SercoSteveB]

Consider the VI BooleanPassThroughValue.vi, below.  If the Default Value of 'Boolean Value In' is TRUE and the value of 'Boolean Value In' set to FALSE before each call.  What are the values of Boolean Value Out after BooleanPassThroughValue.vi is called using Method 1 and Method 2?

BooleanPassThroughValue.vi

NOTE:  Assume all paths and typedefs are correct.

Method 1:

Method 2:

a) After the Method 1 call Boolean Value Out = FALSE, After the Method 2 call Boolean Value Out = FALSE

b) After the Method 1 call Boolean Value Out = FALSE, After the Method 2 call Boolean Value Out = TRUE

c) After the Method 1 call Boolean Value Out = TRUE, After the Method 2 call Boolean Value Out = FALSE

d) After the Method 1 call Boolean Value Out = TRUE, After the Method 2 call Boolean Value Out = TRUE

[Pujacontrols]

Option d: After the Method 1 call Boolean Value Out = TRUE, After the Method 2 call Boolean Value Out = TURE

[Hari_krishnan]

D

[nik35324]

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@SercoSteveB wrote:

If the Default Value of 'Boolean Value In' is TRUE and the value of 'Boolean Value In' set to FALSE before each call.  

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C

Differences Between Calling a VI with an Invoke Node and Calling a VI with a Call by Reference Node

[crossrulz]

Assuming the called VI stays in memory (which is implied by the "Set Boolean In to FALSE"), C.  If not, then D.

And to make the two methods more equivalent, the Wait Until Done in Method 2 should be set to TRUE.

[MrStevenUND]

C or D.

[SercoSteveB]

Answer: C, nice one all.

Check out the link provided by nik35324 for more information