NI Vision Development Module 2011 Known Issues

This document contains the NI Vision Development Module 2011 known issues that were discovered before and since the release of the NI Vision Development Module 2011. Not every issue known to NI will appear on this list; it is intended to only show the severe and more common issues that can be encountered.

Known Issues

The following items are known issues in the NI Vision Development Module 2011.

• Simple calibration is not disposed of properly when you learn simple calibration on an image repeatedly or in a loop. You must remove the calibration information using the IMAQ Remove Vision Info 2 VI to remove the existing simple calibration before learning a new simple calibration by running IMAQ Set Simple Calibration2 VI.
• If you want to learn simple calibration on images that already have perspective or microplane calibration, you must remove the calibration information using the IMAQ Remove Vision Info 2 VI, and then run the IMAQ Set Simple Calibration2 VI to learn simple calibration.
• To store error statistics on corrected images, you must run the IMAQ Get Calibration Info2 VI before correcting the calibration template image. The Return Error Information input must be set to TRUE.
• The IMAQ Get Calibration Info2 VI returns 0 for the X Step and Y Step subparameters of the Grid Descriptor output if the calibration template image was not learned using simple calibration.
• Vision Assistant cannot generate C code if a double-byte character exists in the path to Vision Assistant or in the destination path for the generated code.
• Some Vision Development Module .NET examples only work if Measurement Studio 8.6 is installed.
• The Visual Basic .NET Label example does not compile.
• There is no 64-bit Vision API for C or .NET.
• Installing the Vision Development Module on a Windows Vista 64-bit computer where Visual Studio 2005 has been recently installed causes compatibility warnings.
• The Vision Development Module cannot open two of the installed AVI files, SideCrash1.avi and SideCrash2.avi, when running as a 64-bit application.
• AVI functionality requires Microsoft DirectX 8.1 or later.
• On Windows XP computers with Service Pack 2 installed, NI Vision does not support reading AVI files located in the Local Settings folder, or any subfolders of this folder, when the AVI file uses any of the following compression filters:
  • Indeo® Video 5.10 Compression Filter
  • Intel Indeo® Video R3.2
  • Intel Indeo® Video 4.5
  • Indeo® Video 5.10
    
    Copying the AVI file to another folder resolves this problem.
• Using NI Vision with LabWindows/CVI on a machine that does not support the MMX instruction set may cause an Illegal Operation exception to occur within the LabWindows/CVI environment. This error occurs when DirectX checks for the availability of the MMX instruction set on the machine.
• The Vision Assistant Express VI image caching feature is available in LabVIEW 8.2 or later.

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