This error is received when the SysGen model contains an FDATool block which is configured to generate Hilbert Transformer coefficients for the FIR v6.2 core. This problem does not occur with v5.0 or v6.3 cores which DO support Hilbert structure. So please use either v5.0 or v6.3
For System Generator for DSP Release Notes from other versions, see
(Xilinx Answer 29595).