I'm having problems with the getlistitems webservice. I followed the tutorial and got the list and view id, but I can't locate the <fieldRef> id as the field I want to retrieve is a calculated column and not in the xsf file. I tried entering in the name of the field into the s0:viewFields value but I get the following error.
The SOAP response indicates that an error occurred on the server:
Exception of type Microsoft.SharePoint.SoapServer.SoapServerException was thrown.
<detail>
<errorstring xmlns="http://schemas.microsoft.com/sharepoint/soap/">Element <ViewFields> of parameter viewFields is missing or invalid.</errorstring>
<errorcode xmlns="http://schemas.microsoft.com/sharepoint/soap/">0x82000000</errorcode>
</detail>
Does anyone know an alternate way to obtain the GUID of the column?