Redefining an undefined variable

Hi,

I currently use a scripted function that redefines the earlier variable if it was undefined because of any reason. Please have a look at the attached file, and while opening the file, make sure you say "No" in the dialogue box that prompts you to disable the macros.

While this function works well for single line variables as is evident, but I can't use it in a variable that has more than one lines. Is there a way to solve this problem?

Thanks

Omkar

PS: I found the redefining function somewhere in the forums.