NI Vision Builder AI 2015 Known Issues


This document contains the NI Vision Builder AI known issues that were discovered before and since the release of NI Vision Builder AI 2015. 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.
  • The API can launch the 64-bit version of Vision Builder AI from a 32-bit C or .NET application. However, the C API is not provided for 64-bit C or .NET applications.
  • The OPC UA step is not available in 64-bit Vision Builder AI.
  • Using a TCP slave device with the Vision Builder AI API and the main Vision Builder AI application simultaneously can cause the device to stop communicating.
  • Vision Builder AI behaves unexpectedly or may not display an inspection image if the image is large and your computer is low on available memory.
  • If you configure a step to pass or fail based on pixel distances and subsequently calibrate the image, the step compares calibrated values against pixel-based limits.
  • If you lose connection and reconnect to a remote target after starting an inspection in the Vision Builder AI Configuration interface, the inspection reopens in the Vision Builder Inspection interface.
  • The OCR Training Interface crashes intermittently on exit when using a character file with more than 255 samples.
  • If you drag a floating (pinned open) palette window when configuring the Calculator step, the window may turn invisible during the drag operation.

Glossary of Terms


  • Bug ID - When an issue is reported to NI, you may be given this ID or find it on  You may also find IDs posted by NI on the discussion forums or in KnowledgeBase articles.
  • Legacy ID – An older issue ID that refers to the same issue.  You may instead find this issue ID in older known issues documents.
  • Description - A few sentences which describe the problem. The brief description given does not necessarily describe the problem in full detail.
  • Workaround - Possible ways to work around the problem.
  • Reported Version - The earliest version in which the issue was reported.
  • Resolved Version - Version in which the issue was resolved or was no longer applicable. "N/A" indicates that the issue has not been resolved.
  • Date Added - The date the issue was added to the document (not the reported date).