Chris,
The definition of the Cam coefficients (cam, cam_alpha and cam_beta) needs to be
in a new line, not in the same line as the XC functionals definition, as in the example below
# CAM-B3LYP
dft
direct
xc xcamb88 1.00 lyp 0.81 vwn_5 0.19 hfexch 1.00
cam 0.33 cam_alpha 0.19 cam_beta 0.46
end
task tddft energy