mysql> SET @increment = 10;
mysql> CALL p(@increment);
I faced this problem and try to figure out. I agree with Chris O'Toole. I will add extra step. My steps are,
grunt exec:<theme name>.
grunt less:<theme name>
Finally you can run
When you do any changes in less files(_theme.less or _extend.less) it will automatically create style-l and style-m css files in pub/static folder.
I'm running magento 2.1 in windows 10.