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Altera_Forum's avatar
Altera_Forum
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10 years ago

"cannot place 2 nodes into a single alm" error message while doing signalProbe

Hi All,

I am getting this "cannot place 2 nodes into a single alm" error message while doing signalProbe. This issue comes to me suddenly, and I have always been able to do signalProbe without issues, using the same Quartus version and on this same project.

I have googled, and found a few related answers posted by Altera. Altera says that this is their tool bug, and will be fixed in future Quartus releases. They also suggests some workaround. I tried the workaround, but still cannot get rid of this issue.

https://www.altera.com/support/support-resources/knowledge-base/solutions/rd08222013_171.html

Does anybody know other possible workarounds? Thanks.

My Quartus version is 13.1.0, Linux 64-bit version.

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    7 years ago

    I face the same issue.

    It is design dependant unfortunately.

    I'm trying other synthesis/fitter options to see how I get signal probe working again.

    If you found anything, let me know.

    Altera was not able to reproduce at their side with simple test case.

    Note: I must stick to version 13.1 as further versions of Quartus does not support the stratix III FPGA anymore.
  • Altera_Forum's avatar
    Altera_Forum
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    7 years ago

    Interesting, I got signal probe working again by changing this option in the more fitter settings:

    auto packet registers, changed from normal into off.

    The QSF entry for stratix 3 is this:

    set_global_assignment -name AUTO_PACKED_REGISTERS_STRATIXII OFF

    Which is a bit strange as it points to stratix 2 ..
  • Altera_Forum's avatar
    Altera_Forum
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    7 years ago

    BTW, the issue came back again on the next synthesis.

    I think the issue was solved by actually deleting the

    signalprobe_qsf.tcl

    file as well before running a new synthesis.
  • Altera_Forum's avatar
    Altera_Forum
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    7 years ago

    Deleting files was not helping.

    Adding that and I can signal probe again..

    set_global_assignment -name ROUTER_LCELL_INSERTION_AND_LOGIC_DUPLICATION OFF

    set_global_assignment -name SEED 10