# libSingular issue windows

hello, when i try to run sage i have got following response:

```
sage
Traceback (most recent call last):
File "/opt/sagemath-8.3/src/bin/sage-ipython", line 9, in <module>
from sage.misc.banner import banner
File "/opt/sagemath-8.3/local/lib/python2.7/site-packages/sage/misc/banner.py", line 16, in <module>
from sage.env import (SAGE_VERSION, SAGE_DATE, SAGE_VERSION_BANNER,
File "/opt/sagemath-8.3/local/lib/python2.7/site-packages/sage/env.py", line 186, in <module>
"libSingular not found--a working Singular install in $SAGE_LOCAL "
RuntimeError: libSingular not found--a working Singular install in $SAGE_LOCAL is required for Sage to work
```

Maybe I am wrong but i think it is caused by environment variables. Is there any easy way to fix it? I didn't get any error or warning during installation. Thanks for any reply!

Welcome to Ask Sage! Thank you for your question.

What operating system and what version of it? What version of Sage? How was Sage installed? How are you running Sage?

Note: also asked on sage-support.

Thank you very much for response

Windows 7 Professional SP1 64bit. Sage8.3 . Installed via Windows dedicated installer. I tried run to run it as standard exe program as well as typing sage is sage shell

In the shell, what does

`echo $SAGE_ROOT`

output? What about`echo $SAGE_LOCAL`

? Did you install to the default location? Beyond that it's hard to say what the problem is. Try reinstalling.