Hello Jayaprakash,
Thank you for contacting National Instruments.
Both of the missing VIs that you listed are part of the IMAQ Vision package, which is a separate installation from NI-IMAQ and NI-IMAQ for IEEE 1394. I recommend checking which version of Vision you have installed. The latest version of Vision is 7.1 and includes support for LabVIEW 6.1, 7.0, and 7.1. If you have recently upgraded LabVIEW, then you will need to install Vision support for the new version.
You should be able to fix this issue if you install Vision with support for your version of LabVIEW. If not, let me know your versions of Vision, IMAQ, and LabVIEW so I can continue to assist you.
Best Regards,
Jesse D.
Applications Engineering
National Instruments