I have installed a couple of skins on my DNN 7.3.4 system hosted on GoDaddy. The latest skin I installed was HammerFlex 0.1.8. Each time I get the error message below after the install completes and I click "Return".

The command 'MoveComplete' is not valid for the previous step, make sure the step type is not changed between postbacks.


Here is the complete error log:


AssemblyVersion:7.3.4
PortalID:0
PortalNameften Touched Embroidery
UserID:1
UserName:tonyhost
ActiveTabID:36
ActiveTabName:Extensions
RawURL:/dotnetnuke/Host/Extensions/tabid/36/ctl/Install/rtab/36/portalid/0/Default.aspx?popUp=true
AbsoluteURL:/dotnetnuke/Default.aspx
AbsoluteURLReferrer:http://runamuksoftware.com/dotnetnu...popUp=true
UserAgent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36
DefaultDataProviderotNetNuke.Data.SqlDataProvider, DotNetNuke
ExceptionGUID:2db0c744-9d64-4641-a28a-f5f61ffc5533
InnerException:The command 'MoveComplete' is not valid for the previous step, make sure the step type is not changed between postbacks.
FileName:
FileLineNumber:0
FileColumnNumber:0
Method:System.Web.UI.WebControls.Wizard.OnBubbleEvent
StackTrace:
Message:
DotNetNuke.Services.Exceptions.PageLoadException: The command 'MoveComplete' is not valid for the previous step, make sure the step type is not changed between postbacks. ---> System.InvalidOperationException: The command 'MoveComplete' is not valid for the previous step, make sure the step type is not changed between postbacks.
at System.Web.UI.WebControls.Wizard.OnBubbleEvent(Object source, EventArgs e)
at System.Web.UI.WebControls.Wizard.WizardChildTable.OnBubbleEvent(Object source, EventArgs args)
at System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args)
at System.Web.UI.WebControls.LinkButton.OnCommand(CommandEventArgs e)
at System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument)
at System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
--- End of inner exception stack trace ---

Source:
Server Name: P3NWVPWEB131

Is there any chance that you have set Page State Persistence to Memory *Host, Host Settings, Advanced Settings, Performance)? If so, set it to Page, at least to do the installation. I think that this must be one of the items covered by this disclaimer "Warning: Memory page state persistence can cause Ajax issues"

(Looking at the DNN bug tracker shows that this problem is being addressed, but isn't yet finished.)

Yes, that was the problem exactly.

Thank you very much for the prompt response.

The "standard" advice is to avoid that setting ...