Only one window can be opened

Question

After updating to v2.3.5, only one window can be opened, is it a bug? My system is Ubuntu 18.04 in WLS.

Answer 1

You should be able to start cadabra2-gtk multiple times; that certainly works on Ubuntu 18.04 on bare metal. Using File / New is not intended to open an extra window (essentially, every instance of cadabra2-gtk has one kernel, and if you want more than one kernel you just start a new instance).

Or are you talking about the Jupyter kernel?

Comments

No, I don't mean Jupyter kernel. When I input cadabra2-gtk in terminal to open another window, I get https://1drv.ms/u/s!ArFGkL9IczNNqnLxRlE-rL9Wl3MP?e=pUa4gZ

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Can you try to do the following? First stop all running cadabra2-gtk processes. Then

rm -f ~/.log/Cadabra*

Finally, try to start cadabra2-gtk again. (I suspect that you may have run cadabra2-gtk as root, or otherwise messed up the log database, which it can now no longer write to as a normal user.)

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It doesn't work.

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Give some more details please. Does the first one start? Is your ~/.log directory writable?

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The problem remains unchanged. I have opened the first windows, and another window cannot be opened. The error message is the same as before. The ~/.log directory is writable.

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I have reinstalled Ubuntu 18.04 in WLS, but the question keeps still, i.e. only one window can be open and error reports are the same as the above.

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There is another bug: tab completion doesn't work, and it will result in the crash of Cadabra.

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Thanks for spotting that, I have fixed tab-completion in github.

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Are you building cadabra from source?

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Yes, I build from source.

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Thanks, tab-completion works. But I still can only open one window.

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Hi Kasper, I have tried it on another pc, but still only one window can be opened. The error report is

~$ cadabra2-gtk

(cadabra2-gtk:5931): glibmm-ERROR **: 00:05:22.324: 
unhandled exception (type std::exception) in signal handler:
what: Failed to create table runs

Trace/breakpoint trap (core dumped)
~$ terminate called after throwing an instance of 'std::logic_error'
  what():  Failed to create table runs

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I can't reproduce this outside WSL, and I lack the time at the moment to dig into this further.

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It's ok. I guess I should move on to another platform. This is frustrating for some Windows users. After all, as far as I know, the Windows version still doesn't work.

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With a few rare exceptions, providing binaries/installers is all on my shoulders, and I simply do not have the time anymore to battle with Windows. Despite many people asking for a Windows version, no-one has stepped up to help with building it.

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Got it. Maybe I should also report this bug to WLS developer. I will try other ways. Thanks for your explanation.

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When I install from source, I get the following warning

[ 22%] Building CXX object core/CMakeFiles/cadabra2.dir/Adjform.cc.o
/home/guowei/cadabra2/core/Adjform.cc: In member function ‘uint64_t cadabra::Adjform::to_lehmer_code() const’:
/home/guowei/cadabra2/core/Adjform.cc:230:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if (counts.size() <= perm[i])
/home/guowei/cadabra2/core/Adjform.cc:255:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      if (elem > i)
          ~~~~~^~~
/home/guowei/cadabra2/core/Adjform.cc:266:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (size_t j = 0; j < perm[i]; ++j) {
/home/guowei/cadabra2/core/Adjform.cc: In member function ‘std::__cxx11::string cadabra::Adjform::to_string() const’:
/home/guowei/cadabra2/core/Adjform.cc:297:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    else if (data[i] > i) {
/home/guowei/cadabra2/core/Adjform.cc: In member function ‘void cadabra::AdjformEx::apply_young_symmetry(const std::vector<long unsigned int>&, bool)’:
/home/guowei/cadabra2/core/Adjform.cc:575:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      if (loc >= 0 && loc < values.size() && values[loc] < rk) {
                      ~~~~^~~~~~~~~~~~~~~
/home/guowei/cadabra2/core/Adjform.cc:593:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = r + 1; i < directions.size(); ++i)
                     ~~^~~~~~~~~~~~~~~~~~~

Is it possible to have a relation to the problem?

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No, these are warnings which are related to the meld algorithm only.

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After I update cadabra2 to v2.3.4, the problem raises, and v2.3.2 works fine. I hope this will provide some help for this problem.

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Hi Kasper. After I update wls to wls2, everything is ok.