missing symbol

I also get this bug when I build the scope from the SDK (Crtl + B) then in shell move to the build dir (../build-...) and launch the unity-scope-tool/src/MYSCOPE.ini file.

and the same error when I (in build dir) do 'make install' and launch the unity-scope-tool pointing at the installed scope:
$ unity-scope-tool /usr/local/lib/x86_64-linux-gnu/unity-scopes/s3-scope/s3-scope.ini
scoperegistry: ignoring scope "s3-scope": cannot create metadata: unity::LogicException: Could not get string value (/usr/local/lib/x86_64-linux-gnu/unity-scopes/s3-scope/s3-scope.ini, group: ScopeConfig): Key file does not have key 'Author'
scoperegistry: no remote registry configured, only local scopes will be available
/usr/lib/x86_64-linux-gnu/scoperegistry/scoperegistry: symbol lookup error: /usr/lib/x86_64-linux-gnu/libunity-scopes.so.0: undefined symbol: _ZN5zmqpp6socketC1ERKNS_7contextERKNS_11socket_typeE
file:///usr/share/unity8/Dash/DashContent.qml:104: TypeError: Cannot read property 'loaded' of null
file:///usr/share/unity8/ScopeTool.qml:77:31: Unable to assign [undefined] to scopes_ng::Scope*
file:///usr/share/unity8/ScopeTool.qml:149:23: Unable to assign null to QString
unity-scope-tool: symbol lookup error: /usr/lib/x86_64-linux-gnu/libunity-scopes.so.0: undefined symbol: _ZN5zmqpp6socketC1ERKNS_7contextERKNS_11socket_typeE

fyi, here is a brand new scope from the sdk template that fails with the above error:
lp:~knitzsche/+junk/scope-bug-1297397

finally, I see that it has nothing to do with any scope I created since you can run unity-scope-tool without an arg and it should work, but does not:
$ unity-scope-tool
file:///usr/share/unity8/Dash/DashContent.qml:104: TypeError: Cannot read property 'loaded' of null
file:///usr/share/unity8/ScopeTool.qml:77:31: Unable to assign [undefined] to scopes_ng::Scope*
file:///usr/share/unity8/ScopeTool.qml:149:23: Unable to assign null to QString
unity-scope-tool: symbol lookup error: /usr/lib/x86_64-linux-gnu/libunity-scopes.so.0: undefined symbol: _ZN5zmqpp6socketC1ERKNS_7contextERKNS_11socket_typeE

Hi Kyle, thanks for bringing this to our attention.
Could I please ask that you first ensure that you have built your scope against the very latest unity-scopes API:

1. sudo apt-get update
2. sudo apt-get install libunity-scopes-dev
3. <build your scope>

Then ensure that you have all the latest revisions of the required runtime software:

1. sudo apt-get install unity8 unity-plugin-scopes unity-scope-tool
2. unity-scope-tool

Let me know if this helps / doesn't help.

Hmmm, there also seems to be a problem with the scope template project itself.
Scope ini files now require a mandatory "Author" field.

Adding the line: "Author = Kyle Nitzsche" to: scopekyle-scope.ini, fixes your scope.

I will make sure the template gets updated as soon as possible.

From talking to Kyle yesterday, and comparing installed packages, it seems he was up-to-date.

The missing symbol seems to come from libzmq3, but he had that up-to-date too.

Hi Marcus,

As David mentioned, I appear to have the needed software installed and updated, yet I still have the undefined symbol:

$ apt-cache policy libunity-scopes-dev
libunity-scopes-dev:
  Installed: 0.4.0+14.04.20140324-0ubuntu1
  Candidate: 0.4.0+14.04.20140324-0ubuntu1
  Version table:
 *** 0.4.0+14.04.20140324-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
        100 /var/lib/dpkg/status
$ apt-cache policy unity8
unity8:
  Installed: 7.84+14.04.20140324.4-0ubuntu1
  Candidate: 7.84+14.04.20140324.4-0ubuntu1
  Version table:
 *** 7.84+14.04.20140324.4-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
        100 /var/lib/dpkg/status
$ apt-cache policy unity-plugin-scopes
unity-plugin-scopes:
  Installed: 0.4.0+14.04.20140324-0ubuntu1
  Candidate: 0.4.0+14.04.20140324-0ubuntu1
  Version table:
 *** 0.4.0+14.04.20140324-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
        100 /var/lib/dpkg/status
$ apt-cache policy unity-scope-tool
unity-scope-tool:
  Installed: 7.84+14.04.20140324.4-0ubuntu1
  Candidate: 7.84+14.04.20140324.4-0ubuntu1
  Version table:
 *** 7.84+14.04.20140324.4-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
        100 /var/lib/dpkg/status
$ unity-scope-tool
file:///usr/share/unity8/Dash/DashContent.qml:104: TypeError: Cannot read property 'loaded' of null
file:///usr/share/unity8/ScopeTool.qml:77:31: Unable to assign [undefined] to scopes_ng::Scope*
file:///usr/share/unity8/ScopeTool.qml:149:23: Unable to assign null to QString
unity-scope-tool: symbol lookup error: /usr/lib/x86_64-linux-gnu/libunity-scopes.so.0: undefined symbol: _ZN5zmqpp6socketC1ERKNS_7contextERKNS_11socket_typeE

Ok, problem discussed on IRC and solved; it was caused by local installation of zmqpp.

Ok, so the issue was that there was a rogue installation of zmqpp floating around that needed nuking.
Once that was removed and the zmqpp from distro was installed correctly, everything worked :)

OK, This is now resolved.

I must have had zmqpp installed from a git separately because after doing 'sudo make uninstall' in a zmqpp git dir it works fine.

And this is why I installed zmqpp from git.

The unity-scopes-api branch INSTALL file contains this:

 Some dependencies need to be installed manually as they are not yet available in Ubuntu:
 33
 34 - Zmqpp:
 35 $ git clone https://github.com/benjamg/zmqpp.git
 36 $ cd zmqpp && make && sudo mkdir -p /usr/local/include/zmqpp && sudo make install

I wanted to build the package last week, hit some issues, and followed those instructions.
(I should have remembered this but it was one thing in a list of things).

Ah yes, sorry about that. I had a feeling after we spoke that this was the cause of the issue.
I've MR-ed a branch to fix the INSTALL file.

Fix committed into lp:unity-scopes-api/devel at revision 286, scheduled for release in unity-scopes-api, milestone Unknown