Some errors may be relatively easy to correct while others can be difficult. Examples of some common error messages follow. The STAT command name is spelled incorrectly . The above mistake is corrected, but now the right-hand parenthesis is omitted . . . This may be a signal to a problem that needs to be corrected.
Any statistical analysis is limited by the quality of the data set.
Sometimes it may not be possible to get a satisfactory solution. For example, the following error message puzzles many users. With the OLS command this means that the explanatory variables have perfect collinearity. Sometimes results are obtained that do not make much sense. This could occur if an error message appeared earlier on.