Variable not defined

You use the Option Explicit statement to protect your modules from having undeclared variables and to eliminate the possibility of inadvertently creating new variables when typographical errors occur. This error has the following cause and solution:

• You used an Option Explicit statement to require the explicit declaration of variables, but you used a variable without declaring it.

  Explicitly declare the variable, or change the spelling of the variable to match that of the intended variable.

For additional information, select the item in question and press F1 (in Windows) or HELP (on the Macintosh).