# (Reinstall to fix it?) Error to solve simple equation

I am running sagemath 7.3 on a MacBook air 2013 with MacOS Sierra 10.12.1 (downloaded .app.dmg) but I have the following issue: When I try a simple 'solve' I get an error, literally I copy + paste the lines of an example. (I use the noteboom interface) cell

```
x = var('x');solve([x^2 == 4],x)
```

output

```
RuntimeError: ECL says: The function SET-LOCALE-SUBDIR is undefined.
```

I don't remember to have this issue in the past, (and OS upgrade get messy?) I check that Xcode is up-to-date and not sure if reinstalling it will fix it (currently doing this).

The complete output:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_5.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8 -*-\n" + _support_.preparse_worksheet_cell(base64.b64decode("eCA9IHZhcigneCcpCnNvbHZlKFt4XjIgPT0gNF0seCk="),globals())+"\n"); execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>

File "/private/var/folders/n2/6_5dy4hd5bgdzxcmhrbygpfh0000gn/T/tmpw2yQAk/___code___.py", line 4, in <module> exec compile(u'solve([x**_sage_const_2 == _sage_const_4 ],x) File "", line 1, in <module>

File "/Applications/SageMath-7.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/symbolic/relation.py", line 810, in solve
return f[0].solve(*args,**kwds)
File "sage/symbolic/expression.pyx", line 10679, in sage.symbolic.expression.Expression.solve (/Applications/SageMath-7.3.app/Contents/Resources/sage/src/build/cythonized/sage/symbolic/expression.cpp:53735)
File "sage/symbolic/expression.pyx", line 802, in sage.symbolic.expression.Expression._maxima_ (/Applications/SageMath-7.3.app/Contents/Resources/sage/src/build/cythonized/sage/symbolic/expression.cpp:7281)
File "sage/structure/sage_object.pyx", line 673, in sage.structure.sage_object.SageObject._interface_ (/Applications/SageMath-7.3.app/Contents/Resources/sage/src/build/cythonized/sage/structure/sage_object.c:5506)
File "sage/misc/lazy_import.pyx", line 354, in sage.misc.lazy_import.LazyImport.__getattr__ (/Applications/SageMath-7.3.app/Contents/Resources/sage/src/build/cythonized/sage/misc/lazy_import.c:3486)
File "sage/misc/lazy_import.pyx", line 246, in sage.misc.lazy_import.LazyImport._get_object (/Applications/SageMath-7.3.app/Contents/Resources/sage/src/build/cythonized/sage/misc/lazy_import.c:2241)
File "/Applications/SageMath-7.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/interfaces/maxima_lib.py", line 105, in <module>
ecl_eval("(set-locale-subdir)")
File "sage/libs/ecl.pyx", line 1315, in sage.libs.ecl.ecl_eval (/Applications/SageMath-7.3.app/Contents/Resources/sage/src/build/cythonized/sage/libs/ecl.c:10158)
File "sage/libs/ecl.pyx", line 1330, in sage.libs.ecl.ecl_eval (/Applications/SageMath-7.3.app/Contents/Resources/sage/src/build/cythonized/sage/libs/ecl.c:10097)
File "sage/libs/ecl.pyx", line 343, in sage.libs.ecl.ecl_safe_eval (/Applications/SageMath-7.3.app/Contents/Resources/sage/src/build/cythonized/sage/libs/ecl.c:5162)
RuntimeError: ECL says: The function SET-LOCALE-SUBDIR is undefined.