We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 33799

Virtex-6 FPGA GTH Transceiver Wizard - NCSIM simulation fails with error "ncvlog: *E,NGITEM (../../example_design/v6gth_wrapper_gth_init.v,142|14): Not a valid generate item: 'parameter_declaration' [12.1.3(IEEE 2001)]."


When simulating the outputs from the Virtex-6 FPGA GTH Transceiver Wizard in NCSIM, you might see failures similar to the following:

ncvlog: *E,NGITEM (../../example_design/v6gth_wrapper_gth_init.v,142|14): Not a valid generate item: 'parameter_declaration' [12.1.3(IEEE 2001)].


To work around these errors, "parameter" declarations need to be changed to "localparam".

For example:

parameter [3:0] TXBUFRESET = 4'b0000;

needs to be changed to: 

localparam [3:0] TXBUFRESET = 4'b0000;

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
38596 Virtex-6 FPGA GTH Transceiver - Known Issues and Answer Records List N/A N/A
AR# 33799
Date 06/13/2017
Status Active
Type General Article
  • Virtex-6
  • Virtex-6 LXT
  • Virtex-6 SXT
  • More
  • Virtex-6 HXT
  • Virtex-6 CXT
  • Less
  • Virtex-6 FPGA GTX Transceiver Wizard
Page Bookmarked