I have created the following code in acrobat X

string strfilepath = "C:\\EPIC\\Contracts\\TelRptContract_7242013 352.docx";
app.openDoc(strfilepath);

when i run the debug by ctrl enter

it says

undefined.

when i highlite strfilepath and hit ctrl enter

it says

strfilepath is not defined
1:jsdb_show
undefined

what is wrong with the code snippet