pad_spa/node_modules/less/test/less-bom/errors/add-mixed-units.txt

SyntaxError: Incompatible units. Change the units or use the unit function. Bad units: 'px' and 'em'. in {path}add-mixed-units.less on line 2, column 3:
1 .a {
2   error: (1px + 3em);
3 }