Stata Varlist. See u 11 4 varlistsfor a complete description. That is what local means.
When that happens local macros defined in one statement are not visible to another statement. Following ds and i guess many. This situation may arise due to the use of another command which generates a list of variables based on a set of criteria.
The only thing stata is missing is an easy way to specify variables v1 v2.
See u 11 4 varlistsfor a complete description. See mv mvtest normality for multivariate tests of normality. In commands that alter or destroy data stata requires that the varlist be speciļ¬ed explicitly. A sgmediation command in stata was used to.