mod_log_rotate分割日志的问题

我用了mod_log_rotate这个模块，并且按照要求配置：

# Add to your httpd.conf

LoadModule log_rotate_module modules/mod_log_rotate.so


# Directives provided by mod_log_rotate  

You can specify a strftime() format string as the log file name.  
So you can do something like

CustomLog logs/access_log.%Y%m%d-%H%M%S common

and have log files named with a human readable date and time.


RotateLogs On

RotateLogsLocalTime On

RotateInterval 86400



但是error.log如何配置了。

errorLog logs/error_log.%Y%m%d-%H%M%S

这样配置文件日期无法转换，想问一下该如何设置了。