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Why Do Read/Write Controls Take Longer to Execute after Upgrading to NI RIO 2.3?

Primary Software: LabVIEW Modules>>FPGA Module
Primary Software Version: 8.5
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem: After I upgraded to LabVIEW 8.5 and NI RIO 2.3, Read/Write Controls execute more slowly in my application. What causes this performance decrease and how can I fix it?

Solution: This is a known issue with LabVIEW 8.5 and NI-RIO 2.3. The decrease in performance occurs because the Read/Write Control now uses a Call Library Function Node to call the RIO driver. The Call Library Function Node executes additional code if debugging is enabled. To restore the performance to the original level, you must disable debugging in any VIs that contain Read/Write Controls. You can disable debugging in a VI by going to File»VI Properties»Execution and unchecking Allow debugging, as shown below.

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Report Date: 09/11/2007
Last Updated: 09/24/2007
Document ID: 4DAEDMLX

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