This is a ServerCore error.log in Nokia Gateway Server

How to read it? and how to find out which line and which file??
I couldn't find out the specific doc to describe it.

20030418 130207156 | 4 | 256 | TransformerWenc: error 4002 at [2,1656]: When parsing a WML variable, a variable of the type $(var:escape) had no closing parentheses.

Thanks in advance.