what does the error "IMG_ERR_VLCK can´t lock on video source" means

[yesi]

How can I solve this problem?

[nipun]

Hello yesi,

Thank you for using our discussion forums. The error "Can't lock on Video Source" can occur due to a number of reasons. It mainly implies that the Image Acquisition device is not receiving the video signal, or is not receiving the video signal that it expects. Following is a like to a KnowledgeBase that you can follow to troubleshoot and fix this problem:

Error Codes with NI-IMAQ

I hope this helps you out. Have a great day!

Regards,
Nipun M
Applications Engineer
National Instruments