I had the same issue so I thought I'd try running my database against the source code (with my old version & database connection string in web.config) to see if I could catch the error. Both fortunately and unfortunately however that resulted in the database upgrading correctly, so not sure what exactly was preventing the issue in my initial configuration but upgrading your database in a different fresh install is one way around the issue.
Unable to upgrade from 6.1.5 to 6.2.0, stuck at 5%
We're trying to upgrade but receive the following error in the Umbraco trace log:
2014-05-09 16:56:12,962 [53] ERROR Umbraco.Core.UmbracoApplicationBase - [Thread 62] An unhandled exception occurred
System.ArgumentException: Unknown web method InstallOrUpgrade.
Parameter name: methodName
at System.Web.Handlers.ScriptModule.OnPostAcquireRequestState(Object sender, EventArgs eventArgs)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Can anybody help with this?
Hi Oliver
What steps did you take in order to upgrade?
/Jan
I had the same issue so I thought I'd try running my database against the source code (with my old version & database connection string in web.config) to see if I could catch the error. Both fortunately and unfortunately however that resulted in the database upgrading correctly, so not sure what exactly was preventing the issue in my initial configuration but upgrading your database in a different fresh install is one way around the issue.
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