Bug: Klayout will not display a second time

edited September 2017 in KLayout Support

Starting Klayout and open a GDS file works fine.
However after closing the file and then open another GDS file, the layout window is never opened for the new file.
If there is a method to show the second layout, I have not yet found it.
My only solution is now to terminate Klayout and start it again, to open the next GDS design.
Is this a known behaviour?

System version: macOS 10.12.6 (16G29)
KLayout 0.24.10

Bengt Nilsson


  • edited 9:59PM

    Hi all,

    I'm not a Mac user, so I can't confirm this issue. It is not seen on Windows or Linux.

    Is there anyone who can confirm or comment on this?


  • edited September 2017

    Hi Matthias,

    I've checked roughly.

    1. Result
        * Could not reproduce the issue reported by Bengt using the two
          GDS2 data bundled with the source code:
            a) pcell_test_0.gds
            b) t9.gds
        * KLayout works fine.
    2. Executable
        * KLayout 0.24.10
        * from the binary package
          that I provided in April.
    3. Environment
        * OS: macOS Sierra version 10.12.6 (virtual machine)
        * memory: 6GB
        * host: VMware Fusion version 8.5.8 running on OSX Yosemite 10.10.5
        * real machine: MacBook Pro Mid. 2012 / 16GB / Core i7 / 2.9GHz
    4. Notes on the binary package and run time environment
        * The binary package was built on OSX Yosemite 10.10.5 with
          Qt 4.8.7 from MacPort.
        * The "macOS Sierra" machine is set up as a pure end user machine.
          That is, no development tool (Xcode, MacPorts, Homebrew, Anaconda, etc.)
          has been installed.


  • edited 9:59PM

    Hi Kazzz,

    thanks for this confirmation ... @benilsson: maybe it's possible to narrow down the issue?



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