Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Tcl error while generating functional simulation Netlist

Hello,

I was trying the generate the "General Functional Simulation Netlist" and I got this error message as below

Error: Tcl error: can't unset "::quartus(qip_path)" no such element in error while executing

"unset::quartus(qip_path)"

What is the error message telling me?

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Do you have .qip files in your design? (Quartus IP files). They basically bundle all the IP files(i.e. I'm looking at a QSYS project with over 50 files, all added this way so the user doesn't have to manually manage them). If you look inside, the syntax used is something like so:

    set_global_assignment -name VERILOG_FILE [file join $::quartus(qip_path) submodules/pci.v]

    The $ does variable substitution in Tcl. So $::quartus(qip_path) substitutes the hierarchy path to the .qip file. So wherever the user has the .qip file, as long as there is a /submodules/pci.v from it, it will find it. It allows all the IP to be bundled, moved around, added to other projects, etc.

    In Tcl unset removes the value of a variable.

    So what is your error from? I have no idea. : )

    But hopefully that an help debug. Look in the .qip files for an unset. Does the design compile normally?