Free of charge deivery -order type FD item category KLN , error during PGI

Hi Expert,

We have a scenario , where an item is being deliver but while doing PGI, it is giving an below error :

M2 815, error while determ. Loc. crcy : exchange rate type M date XXXXXXX from  to CAD in RMCS1000.

Basically in the routine no source currency is being populated. for the delivery document  , LIKP-WAERK there is no value maintain. When in debug added  the same Document currency as local, it gives no error.

can you provide any location while system is behaving like this, were I need to check?

Thanks in advance.