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If I use version 19.0 for webservices API , I get UNSUPPORTED_API_VERSION
I am trying to login at https://www.salesforce.com/services/Soap/c/19.0
My account is rajaraodv100@cde-chatter-yahoo.com
<?xml version="1.0" encoding="UTF-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap
/envelope/" xmlns:sf="urn:fault.enterprise.soap.sforce.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
><soapenv:Body><soapenv:Fault><faultcode>sf:UNSUPPORTED_API_VERSION</faultcode><faultstring>UNSUPPORTED_API_VERSION
: Invalid Api version specified on URL</faultstring><detail><sf:UnexpectedErrorFault xsi:type="sf:UnexpectedErrorFault"
><sf:exceptionCode>UNSUPPORTED_API_VERSION</sf:exceptionCode><sf:exceptionMessage>Invalid Api version
specified on URL</sf:exceptionMessage></sf:UnexpectedErrorFault></detail></soapenv:Fault></soapenv:Body
></soapenv:Envelope>
v19 (aka Summer'10) is only available on the sandbox instances currently, see the upgrade schedule on trust.salesforce.com for the dates for the other instances.