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API Error with new Apex Data Loader Version 18.0

I have received the following error when I use the new Apex Data Loader Version 18.0.  My code worked fine with version 17.0.  The best documentation I can find on the error is that their is a method that I am calling (SOAP) that is not available.  Did version 18.0 drop something that was 17.0?


2002 [accountToHoldingCompany] ERROR com.salesforce.dataloader.process.ProcessRunner  - Invalid Api version specified on URL Exception in thread "main" java.lang.RuntimeException: [UnexpectedErrorFault [ApiFault  exceptionCode='UNSUPPORTED_API_VERSION' exceptionMessage='Invalid Api version specified on URL'

Not all instances are upgraded to v18, sounds like your account is one of them. See the upgrade schedule on the trust.salesforce.com site.