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Why doesn't the input file dialog prompt once I attach it to a device?

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For my project I am require to move a 3-axis robot from a list of set co-ordinates to either cut into/draw a picture. The only way I can thnk of doing this is by reading the co-ordinates from a spread sheet and timing it to read the co-ordinates and send the information to the straight-line move function (Softmotion).

 

The problem occurs once I try to run the program while it's connected to the devices (motors). The file dialog prompt no longer shows up and Error 43 shows up right away. I traced the problem to the read from spread sheet vi, but I am not sure what to do because it is a standard function in labview.

 

If you could take a look and give me some input it would be greatly appriciated, I've been learning labview on my own for about a month so if you can please use simple explinations.

 


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