SAS is a very User Friendly tool. By default it has 3 window
1.Enhanced Editor
2.Log Window
3.Output window
and also u find explorer and result window in left side.

when ever error occurred in program , sas system throws errors into log window.and also it will tell the expected variables or symbols in place of error.
by just seeing the errors you have to correct the program.

for example when you are using macro debugging options,
in that you are calling a macro that is not there in system.
then the sas system displays error like this.
"Apparent invocation of macro not resolved".

for more faqs click this blog spot.
http://onlysas.blogspot.com/