String to DATS format conversion in XI.

Hello Experts,

I am using Powerbuilder system to get my Legacy data.In Powerbuilder Date needs to be supplied in STRING format.So I am giving String Format (dd-mmm-yyyy).

However, at SAP end, Date needs to be in DATS format (Standard SAP yyyymmdd) .

In Message Mapping I have given I/P structure as String and O/P structure as DATS format. When I test mapping in XI, it gives me Parseable error.

Can anybody tell me, is there any way in XI to convert from String to DATS format so that I do not get Parseable error.

Please Help!!!!