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How do I save a radare2 session after I did "aa"?

I know there is a command for saving a project, but this isn't working out for some reason (Ps PROJECTNAME). So I am looking for a way to save my analysis progress and if possible retain renamed variables.

It currently doesn't work because if I open it again another time it won't load the renamed variables and I can't do stuff like "ood" which is the way to reopen the binary as far as I'm concerned. But there are no errors.

After invoking radare2 with r2 -d calc I run aa and then Ps calc_project. After that I close the terminal and open up a new one. Then I start with r2 -d calc again and follow it with Po calc_project. Now, there are many errors which appear to be the same over and over again:

fcn_recurse failed
Cannot add basic block", that message 50 times or more.

Version information:

radare2 version: 
radare2 3.1.0-git 20049 @ linux-x86-64 git.3.0.1-214-g5759f21
commit: 5759f217c941478ef265bf9a6ba5e23cd646661a
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    Why Ps doesn’t work? Any error? – Paweł Łukasik Nov 13 '18 at 17:11
  • please edit your question and state how you actually do the Ps. I'm doing it and see no obvious issues - also state what version of r2 you are using. – Paweł Łukasik Nov 13 '18 at 19:11
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    Hey unicorn123, going by the assumption that you are the same individual as @q7v6rhgfzc8tnj3d you can request your accounts to be merged. If you don't want or need that, it's okay as well. This is also the likely reason you could not comment on your own question then. – 0xC0000022L Nov 13 '18 at 19:12
  • In recent times the r2 project system has been broken. Try updating or opening an issue – mrexodia Nov 18 '18 at 17:31

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