When I synthesize my System Generator for DSP design, an error similiar to the following occurs:
"ERROR:Xst:2587 - Port <data> of instance <dds_compiler_virtex4_2_1_..._instance> has different type in definition <dds_compiler_virtex4_2_1_...>"
This error can occur if you specify the "Frequency Resolution" as a formula which has a large number of digits in the result, such as 200E6*(2^25), for example.
To work around this issue, enter the result of the chosen formula using fewer significant digits. In this example, using the value 5.960464 will result in the correct width being specified in the HDL file.