Thanks, your sample was very helpful.
Summarizing, predefined SOAP Operators (CA SLCM Operators folder in PAM) has problems, so we were able to make it work using the General Web Service Operator called "Invoke SOAP Method", For details about methods we use the WebService API located in CA Service Catalog Administration /tools menu.
Within PAM, in operator's properties/SOAP Call Data, we use the WSDL Wizard in order to defined the method we will be calling and in Dynamic Parameters we set Process variables as values for SOAP Method required input parameters.
Again, thanks for your help.
Regards,
JOHN