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Receiving Error 1074396995 While Acquiring an Image

Primary Software: LabVIEW Development Systems>>LabVIEW Professional Development System
Primary Software Version: 8.6
Primary Software Fixed Version: N/A
Secondary Software: LabVIEW Toolkits>>IMAQ Vision for LabVIEW
Hardware: Image Acquisition (IMAQ)>>Analog Image Devices

Problem:
Why am I getting Error 1074396995: The requested image acquisition device is already in use when I run my image acquisition VI?

Solution:
This error is generally received when two programs try to access an image acquisition device at the same time. For example, if you have the device selected in Measurement and Automation Explorer (MAX) and are trying to perform an image acquisition in a VI, you will receive this message. You must deselect the acquisition device in MAX or close MAX in order for your VI to run correctly.

This error can also occur when using IMAQ functions with an unwired IMAQ session. If an IMAQ session is initialized but not passed to the IMAQ Grab/Snap/Sequence function, a second session will be created resulting in error 1074396995. Make sure that only one IMAQ session is created and referenced correctly in your application.

Related Links:
KnowledgeBase 4N0B2IGL: What Version of NI-IMAQ Does My Frame Grabber Support?
Products and Services: Software to Acquire, Save, and Display Images

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Report Date: 02/18/2009
Last Updated: 03/23/2009
Document ID: 4UHCCGRQ

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