Error when adding function to webservice

Hello guys,

I'm new in this SAP world and I'm trying to add a function to a web service and I get an error. This one:

Categoría              Error de programación ABAP

Err.tmpo.ejec.         RAISE_EXCEPTION

Programa ABAP          CL_ESD_VIF_FUGR_PLUGIN========CP

Anwendungskomponente   BC-DWB-WS-ABA

Fecha y hora           24.10.2014 09:36:45

I added antoher function from the same group of functions to the same webservice and I didn't get any error. But today I fails with every function, even if I try to delete the function I added yesterday...