LabVIEW for LEGO MINDSTORMS and LabVIEW for Education

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Feedback Node error and NXT

I'm trying to create a simple counter using a LabView 8.5 and the NXT.  I'm using a Feedback Node and it does not show an error while editing the VI.  When I try to download the VI to the NXT I get the following error.

 

ERROR: An error occurred during parsing.  Node was unable to be parsed. ((Class: FeedbackNode) (VI:Teleop.vi))

 

List of errors:

ERROR: An error occurred during parsing.  Node was unable to be parsed.

 

When I click on the error it highlights the feedback node (arrow pointing left).

 

Sean

 

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I found the problem after reading this document:

ftp://ftp.ni.com/evaluation/mindstorms/LabVIEW_for_NXT_Advanced_Programming_Guide.pdf

 

Feedback nodes are not supported in a while loop.  But, you can convert it to a shift register and it will function.

 

Sean

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