Static ASSIGN with Offset Specification

Hi,

While trying to work with field symbols using static ASSIGN and Offset/Length Specification, got the error as mentioned below.

So unless I mention the explicit length of the Offset or '*', I get the error. I was reading through the following link for some information & working through the code snippets when I ran into the issue,

https://help.sap.com/saphelp_nw04/helpdata/en/fc/eb38d5358411d1829f0000e829fbfe/content.htm

Any information on the same would be very helpful.

Thanks

Srujana