I Can’t Change the Attributes of My Camera on NI MAX

Updated Apr 13, 2022

Reported In


  • Measurement & Automation Explorer (MAX)


  • Vision Acquisition Software

Issue Details

  • I'm trying to change the attributes of my camera from NI MAX, but when I save the changes, close MAX, and reopen it again, the attributes are the same as the beginning.
  • I'm trying to use multiple of same cameras, and when I try to change the attribute of specific camera, the change applies to other cameras. 


To work with camera devices, NI MAX takes information from two files:

  • The .icd file that has all the attributes of the camera.
  • The .iid file that saves the name of the .icd file and additional information from the device, like the serial number.
  • Both files are located at C:\Users\Public\Documents\National Instruments\NI-IMAQdx\Data or C:\Users\Public\Documents\National Instruments\NI-IMAQ\Data depending on the driver used (NI-IMAQdx or NI-IMAQ respectively).

To solve this issue try the following steps:

  • Check that the name of the .icd file appears correctly in the .iid file. If the .iid file stores a different name, NI MAX will not be able to find the correct .icd file, and it will not change or update the attributes.
  • Check if there is .icd and .iid file for all cameras used. If the files for a specific device are missing, create by making a copy of other existing files and updating information such as serial number. 
  • The .icd and .iid files are corrupted and new files are required:
    • Disconnect the camera from the PC.
    • Delete both files from one of the paths mentioned before. For instance, if you are using a USB 3.0 camera, the NI-IMAQdx driver will be used and the files are located at C:\Users\Public\Documents\National Instruments\NI-IMAQdx\Data.
    • Reconnect the camera.
    • Verify that new files were created.
    • Test that camera attributes changes are properly saved.

Additional Information

For example, with the .icd file names as  'AVT Pike F145C (#000A4701100A3031).icd', a correct .iid files will show the next information: 

A wrong .iid will show the next information: