Hello, We would need some help, please   First of all **thanks for your time used reading this question** Also, thanks for your patience   We need to generate an ACK in a Process and return it to the Service to reply   We have currently written a code block with:   //Devolvemos ACK AA a DragoAP para indicar que no procesamos las prepeticiones set pOutput = ##class(%GlobalCharacterStream).%New() //set ACKer7 = ..GetAck(mensajeHL7, "AA") <strong> set ACKer7 = ##class(ITB.HL7.BS.XMLService).GetAck(context.mensajeHL7, "AA")</strong> set ACKxml = ##class(ITB.HL7.Util.Convert).ER7ToXML(ACKer7,.tSC) set inicioCabecerasSOAP = "<SOAP-ENV:Envelope xmlns:SOAP-ENV=""http://schemas.xmlsoap.org/soap/envelope/""><SOAP-ENV:Header/><SOAP-ENV:Body>" set finCabecerasSOAP = "</SOAP-ENV:Body></SOAP-ENV:Envelope>" do pOutput.Write(inicioCabecerasSOAP_ACKxml.Read()_finCabecerasSOAP)   When we test this code, we observe:
  ERROR <Ens>ErrException: <METHOD DOES NOT EXIST>zS5+6^Procesos.Laboratorio.EnrutadorLaboratorio.Thread1.1 *GetAck,ITB.HL7.BS.XMLService -- - registrado como '-' número - @' set ACKer7 = ##class(ITB.HL7.BS.XMLService).GetAck(context.mensajeHL7, "AA")'
  Why do we get this error message?   As you would notice we have written: **`set ACKer7 = ##class(ITB.HL7.BS.XMLService).GetAck(context.mensajeHL7, "AA")`**   When we press F12 above `ITB.HL7.BS.XMLService`   We observe the desired **GetAck** method   How could we further debug, understand, and solve this issue?   ➡️  We have read: https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=EGDV_BUSPROC https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=EBPL_EDITOR https://community.intersystems.com/post/reply-custom-ack https://www.intersystems.com/wp-content/uploads/sites/10/WiFISEasyConnect_2.0.pdf   ➡️  Thanks for your replies