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AR# 8648

WebPACK XST - ERROR :(VHP_0808): + cannot have such operands in this context.


General Description

While synthesizing VHDL designs in WebPACK, the following error messages occur:

ERROR : (VHP__0808). C:\Project\test.vhd Line 115. + can not have such operands in this context

EXEWRAP detected a return code of '1' from program 'xst'

EXEWRAP complete - 0 errors, 0 warnings.

Done: failed with exit code: 0001.


If the VHDL code is using any arithmetic operands, include arithmetic unsigned

or signed IEEE packages in the code.

In VHDL code, add either of these packages, depending on the sign convention

of the design:

use ieee.std_logic_unsigned.all;


use ieee.std_logic_signed.all;
AR# 8648
Date Created 08/31/2007
Last Updated 09/08/2010
Status Archive
Type General Article