[Fpga-synth] Very Odd Error Message from WebPACK ISE

[Eric Brombaugh]

Scott Gravenhorst wrote:
> While working on this latest synth, I am getting this error:
> 
> ERROR:Portability:74: - ************************************************ Port_Compress::UnCompress() : (Z_DATA_ERROR) input data was corrupted.

What stage of the build process were you in when you saw this? XST, 
NGDBUILD, MAP, PAR, BITGEN?

Eric