Error occurred during local report processing in prod, OK on test system

I am getting this error in production, not on test system.  Here is the information I have:

Microsoft.ReportViewer.WebForms 9/2/2015 7:34:23 PM  Exception generated on Wednesday, September 02, 2015, at 7:34 PM

 Browser: InternetExplorer-11.0

 Language: en-US

 Message: Exception of type 'System.Web.HttpUnhandledException' was thrown.

 InnerMessage: An error occurred during local report processing.

 Source: Microsoft.ReportViewer.WebForms

 Method: Void EnsureExecutionSession()

 Stack Trace:    at Microsoft.Reporting.WebForms.LocalReport.EnsureExecutionSession()   

at Microsoft.Reporting.WebForms.LocalReport.SetParameters(IEnumerable`1 parameters)   

at SecureAdmin_PrintProposal.ReportViewer1_Load(Object sender, EventArgs e)   

at System.Web.UI.Control.OnLoad(EventArgs e)   

at System.Web.UI.Control.LoadRecursive()   

at System.Web.UI.Control.LoadRecursive()   

at System.Web.UI.Control.LoadRecursive()   

at System.Web.UI.Control.LoadRecursive()   

at System.Web.UI.Control.LoadRecursive()   

at System.Web.UI.Control.LoadRecursive()   

at System.Web.UI.Control.LoadRecursive()   

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Help is most appreciated.