Error message in pivot when i try drag and placing a column in the row label

[olybobo]

hello experts;

i get the following error message below when i try dragging and placing a new column in the row labels in my pivot table. does anyone know what is causing the error

============================
Error Message:
============================


----------------------------
The command was canceled. Please press F1 to get the help topic "Excel Window: PowerPivot Field List" for more details.

============================


Call Stack:
============================

at Microsoft.AnalysisServices.XLHost.Addin.ExcelInter OpUtil.AddToFields(String cubeFieldName, XlPivotFieldOrientation pivotOrientation, Int32 positionIndex)
at Microsoft.AnalysisServices.XLHost.Addin.GeminiPivo t.SetFieldOrientation(PivotArea location, IGeminiColumn column, Int32 positionIndex)
----------------------------
at Microsoft.AnalysisServices.XLHost.Addin.GeminiPivo t.SetFieldOrientation(PivotArea location, IGeminiColumn column, Int32 positionIndex)
at Microsoft.AnalysisServices.XLHost.Addin.GeminiPivo t.AddToFieldListInternal(PivotArea location, IGeminiColumn column, Int32 positionIndex)
at Microsoft.AnalysisServices.XLHost.Addin.GeminiPivo t.MoveField(IGeminiColumn column, PivotArea source, PivotArea target, Int32 positionIndex)
at Microsoft.AnalysisServices.XLHost.Addin.FieldListC ontrol.MoveFieldInternal(IGeminiColumn field, PivotArea sourceArea, PivotArea targetArea, Int32 targetIndex)

============================