IMAQ Vision: (Hex 0xBFF6048C) Invalid grading mode.

[willy0908]

i am using the usb grab vi's and when i run my vi i get an error

IMAQ Vision:  (Hex 0xBFF6048C) Invalid grading mode.

what does it mean and how do i fix it?

Thanks for your help  

[BCho]

Unfortunately, NI-IMAQ for USB cameras is not an officially supported driver. Our officially supported camera bus architectures are Analog, Cameralink, IEEE 1394, and GigE Vision. Each architecture has an associated specification that is widely adopted in the machine vision industry, whereas USB does not. I can attempt to assist you further by searching for some more information on our internal database, but will need more information about your hardware and how you are using the various grab vi’s. Have you been able to acquire images through other means, namely Measurement and Automation Explorer or another Windows application? Also, is your device “DirectShow” compliant? As mentioned earlier, the USB architecture is not officially supported.

Let me know if this articles help or if you have some more information about your system.

BCho

Applications Engineering

National Instruments

[willy0908]

I have a Logitech QuickCam Conmmunicate STX. a logitech help forum says it is directshow compliant. For now i am just trying to use the labview USB grab vi examples that came with the documentation from the labview website. So far no luck with them. The camera works with NI Vision Assistant 8.6. I will take a look at those links and let you know. Thanks for your help.

[willy0908]

I got the example grab VI to work by using labview 8.6. But after stopping the run i have to completely close labview for the vi to aquire an image again. 

[willy0908]

sorry i solved the problem. i had a continuous loop. added a stop button.  

[BCho]

Hey willy, Good to hear you found and fixed your problem. Thanks for letting us know you solved it and how. This may be helpful for people experiencing a similar issue in the future. Thanks again. Ben Applications Engineering National Instruments

[willy0908]

your welcome. now i am having another problem. i would like to save the image to a folder on the desktop. but when i use the write to file this error pops up  

error -1074395992 occurred at IMAQ WriteBMPFile File access denied. 

how can i solve this problem?  i have tried to attach my vi but i get an error so i have uploaded an image of it. for the camera im using a Logitech QuickCam Communicate STX. the only part that doesnt work is the save after the snap 

[willy0908 · Accepted solution]

another dumb mistake. needed to give it a file name in the folder not a folder name.