Virtual devices default with 255 channels, 8 levels, and 1 port. This will cause problems when combined with G4 panels, which can have 4000 channels per port, 600 levels per port, and 100 ports. It is seen that some functions will work, like some pushes, but others, like feedback, will not work.

If you need to set the port count, this should be done in the DATA_EVENT/ONLINE: handler for port 1 of the individual device. The command is:

SET_VIRTUAL_PORT_COUNT (DEV Device, INTEGER Count)

If you need to set the channel or level counts, this should be done in the DATA_EVENT/ONLINE: handler for the specific port being adjusted. These commands are:

SET_VIRTUAL_CHANNEL_COUNT (DEV Device, INTEGER Count)

SET_VIRTUAL_LEVEL_COUNT (DEV Device, INTEGER Count)

An example would be:

SET_VIRTUAL_CHANNEL_COUNT (vdvVirtual,2400)

That would be setting the channel count on the device vdvVirtual to be 2400 channels. Remember that memory is allocated for the channels, levels, and ports that are assigned, so only set to the count that is actually needed.