Failed to find 'implement_input_in_lcell' in hierarchical name

Description

Due to a problem in the Quartus® II software version 10.0, this error message may be generated when simulating a design containing an ALTDDIO_IN megafunction.

To work around the problem, regenerate the ALTDDIO_IN megafunction using the MegaWizard™ Plug-In Manager in the Quartus II software version 10.0 SP1 or later. Alternatively, edit the variation file produced by the ALTDDIO_IN MegaWizard Plug-In, and remove or comment out the following line:

• Verilog HDL variation file:

ALTDDIO_IN_component.implement_input_in_lcell = "ON",

• VHDL variation file:

implement_input_in_lcell => "ON",

This problem is fixed beginning with the Quartus II software version 10.0 SP1.