Hi,
I tried with aug-ccpvDz and got the same error message. I took thes last coordinates and optimized them with b3lyp. Then I changed to aug-cc-pvTz and optimized again with b3lyp:
F 0.000000000000 -0.000000000000 1.816287793032
CL 0.000000000000 -0.000000000000 -0.216881726081
C 0.000000000000 -0.000000000000 -1.841212590418
H -0.933731416408 -0.000000000000 -2.395213148818
H 0.933731416408 0.000000000000 -2.395213148818
Further optimization with MP2/Aug-cc-pVTZ leads to
F 0.000000000000 -0.000000000000 1.772804495357
CL 0.000000000000 -0.000000000000 -0.205507096512
C 0.000000000000 -0.000000000000 -1.810531270997
H -0.933577256852 -0.000000000000 -2.365356953842
H 0.933577256852 0.000000000000 -2.365356953842