FM or BAPI to get document currency?

I am in search for FM or BAPI which will help me in solving my program.

I am using "BAPI_GL_GETGLACCBALANCE" to get the amount in Local currency, by using CURRENCYTYPE value '10'.

If I use the same BAPI to get document currency, by using

CURRENCYTYPE value '00', i get error message "Account does not exit". Is there any way to get the document currency for the given account using FM / BAPI.

Prabhu Rajesh.