Error creating logs directory in Apache Tomcat

java.util.logging.ErrorManager: 4: Unable to create [c:pache-tomcat-7.0.30 -Dcatalina.home=c:pache-tomcat-7.0.30\logs]

I was getting this error recently, and found that it was caused by having a trailing backslash on my CATALINA_HOME variable.

i.e.
Incorrect:

set CATALINA_HOME=c:pache-tomcat-7.0.30\

Correct:

set CATALINA_HOME=c:pache-tomcat-7.0.30