Filename length in Selection-Screen Parameter

Hello Experts,

Got to know that the maximum length of the Parameter in Selection-Screen is 132.

I've also searched in the SCN forums but none of the thread was related to Filename.

I've a requirement where in I'm passing the Filename in the Parameter. The length of the Folder path is more than 180 characters.

I'm unable to add the Default value to the parameter.

How can I do this? Please advise.

Thanks & Regards,

Sowmya