Hi, Martin,
The error you are seeing is correct - the PCI-1407 does not support the IMAQ Generate Pulse VI. As stated in the VI Help for IMAQ Generate Pulse, "Currently, only the IMAQ PCI/PXI-1409, IMAQ PCI/PXI-1422, IMAQ PCI-1424, and IMAQ PCI-1428 can generate pulses."
Best regards,
Dawna P.
Applications Engineer
National Instruments