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error in

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# The following properties set the logging levels and log appender. The
# log4j.rootCategory variable defines the default log level and one or more
# appenders. For the console, use 'S'. For the daily rolling file, use 'R'.
# For an HTML formatted log, use 'H'.

log4j.rootCategory=DEBUG, S,R
# The following properties configure the Daily Rolling File appender.
log4j.appender.R = org.apache.log4j.DailyRollingFileAppender
log4j.appender.R.File = c:/excel/sm7.log
log4j.appender.R.Append = true
log4j.appender.R.DatePattern = '.'yyy-MM-dd
log4j.appender.R.layout = org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss},[%p],%c{1},%M,%m%n


public class Main
static Logger logger = Logger.getLogger("Main");

Error in console , while executing java file

log4j:WARN No appenders could be found for logger (Main).
log4j:WARN Please initialize the log4j system properly.
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sulthan mathina
log4j.rootCategory=DEBUG, S,R

check whether you commented the above mentioned lines.
and remove the S.your code should be like this

Because you haven't used S in your file.
If you use S you will get the following error

In your java class use this way

instead of static Logger logger = Logger.getLogger("Main");

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