Hello Berenice,
Thank you for using our discussion forums. From your description of the problem it sounds like NI-IMAQ support for LabWindows/CVI hasn't been installed. Follow the steps below to install NI-IMAQ support for LabWindows/CVI:
1. Shutdown CVI and launch Add or Remove Programs.
2. From the list of programs installed on your machine select National Instruments Software.
3. On making this selection you will see a button that reads "Change", click this button.
4. Pressing change will launch a window that lists all National Instruments Software installed on your computer.
5. Select NI-IMAQ from this list and press "Modify", this will bring up the installation options for NI-IMAQ
6. From the list select support for LabWindows/CVI and proceed with the installation.
7. Once the install is complete restart your computer and launch LabWindows/CVI. You should now see NI-IMAQ functions in the libraries.
If there is still a problem, make sure that niimaq.fp and niimaq.lib files are present under "C:\Program Files\National Instruments\CVI\bin folder". Have a great day!
Regards,
Nipun M
Applications Engineer
National Instruments