Exception from HRESULT 0x800A03EC Error

Question

I am getting  HRESULT  0x800A03EC  error when running Excel add-in with following code   Excel Range rng   ActiveSheet Cells x  y  as Excel Range                  string before   rng Value2   string cleanV   System Text RegularExpressions Regex Replace before     s         rng set Value cleanV     When error happens X and Y are set to 1  thus Excel range is not violated  I searched extensively and tried a number of ways of setting the cell value  eg  Cells x y   range set Value    but am at loss why this error happens and how to avoid it   Any help is greatly appreciated   Below are exception details     System Runtime InteropServices COMException was unhandled by user code   HResult -2146827284   Message Exception from HRESULT  0x800A03EC   Source      ErrorCode -2146827284   StackTrace         at System RuntimeType ForwardCallToInvokeMember String memberName  BindingFlags flags  Object target  Int32   aWrapperTypes  MessageData amp  msgData         at Microsoft Office Interop Excel Range set Value Object RangeValueDataType  Object value         at ImportValidation ThisAddIn removeAnySpaces Int32 x  Int32 y  in c  Users dshevelev Documents Visual Studio 2012 Projects ImportValidation ImportValidation ThisAddIn cs line 354        at ImportValidation ThisAddIn ReadHeaders Hashtable columnAddress  in c  Users dshevelev Documents Visual Studio 2012 Projects ImportValidation ImportValidation ThisAddIn cs line 123        at ImportValidation ThisAddIn mapColumns   in c  Users dshevelev Documents Visual Studio 2012 Projects ImportValidation ImportValidation ThisAddIn cs line 493        at ImportValidation Ribbon1 button6 Click Object sender  RibbonControlEventArgs e  in c  Users dshevelev Documents Visual Studio 2012 Projects ImportValidation ImportValidation Ribbon1 cs line 55        at Microsoft Office Tools Ribbon RibbonPropertyStorage ControlActionRaise IRibbonControl control         at Microsoft Office Tools Ribbon RibbonPropertyStorage ButtonClickCallback RibbonComponentImpl component  Object   args         at Microsoft Office Tools Ribbon RibbonManagerImpl Invoke RibbonComponentCallback callback  Object   args         at Microsoft Office Tools Ribbon RibbonMethodInfo Invoke Object obj  BindingFlags invokeAttr  Binder binder  Object   parameters  CultureInfo culture         at Microsoft Office Tools Ribbon RibbonManagerImpl System Reflection IReflect InvokeMember String name  BindingFlags invokeAttr  Binder binder  Object target  Object   args  ParameterModifier   modifiers  CultureInfo culture  String   namedParameters    InnerException

User · Answer

This is a common but poorly documented Excel COM Error. I've seen it documented as "NAME_NOT_FOUND", meaning that Excel's COM layer is disabled, and can't find the COM property or method name.

I get this error consistently when running the COM code while Excel is 'busy', for example if you set a timer that will start the code, and the code starts running while the user is editing a cell or pressing down their mouse button, then you'll always get this error. This error only happens when the code runs on the main Excel thread, but seems to be the equivalent of error VBA_E_IGNORE = 0x800AC472, which you get when calling the Excel COM object model from another thread, while Excel is 'busy'.

The only workaround seems to be to retry (with some small delay) the COM call until it succeeds - when Excel is no longer 'busy'.

User · Answer

We had the same problem and found for us the solution       Please make this folder    C  Windows SysWOW64 config systemprofile Desktop     Windows 2008 Server x86   Please make this folder    C  Windows System32 config systemprofile Desktop

User · Answer

An additional cause for this error   The code sample below returns the error when the datatable  dtTable  has a blank tablename      Open Excel workbook   objExcelApp   New Application   objExcelWorkbook   objExcelApp Workbooks Add     objExcelSheet   objExcelWorkbook ActiveSheet   objExcelSheet Name   dtTable TableName

User · Answer

Check your start indexes   Its start from 1 not 0 for Microsoft Office Interop Excel range objects  I had received same error because of my loop start value

User · Answer

Still seeing this error in 2020  As was stated by stt106 above  there are many  many possible causes  In my case  it was during automated insertion of data into a worksheet  and a date had been incorrectly typed in as year 1019 instead of 2019  Since i was inserting using a data array  it was difficult to find the problem until I switched to row-by-row insertion  This was my old code  which  quot hid quot  the problem data      Dim DataArray MyDT Rows Count   1  MyDT Columns Count   1  As Object     Try         XL Range XL Cells 2  1   XL Cells MyDT Rows Count  MyDT Columns Count   Value   DataArray     Catch ex As Exception         MsgBox  quot Fatal Error in F100 at 1270   quot   amp  ex Message          End     End Try  When inserting the same data by single rows at a time  it stopped with the same error but now it was easy to find the offending data  I am adding this information so many years later  in case this helps someone else

User · Answer

I was receiving the same error some time back  The issue was that my XLS file contained more than 65531 records 500 thousand to be precise   I was attempting to read a range of cells   Excel Range rng    Excel Range  myExcelWorkbookObj UsedRange Rows i     The exception was thrown while trying to read the range of cells when my counter  i e   i    exceeded this limit of 65531 records

User · Answer

Got this error also      it occurs when save to filepath contains invalid characters  in my case   path    C  somefolder anotherfolder file xls     Note the existence of both   and     Also may occur if trying to save to directory which doesn t already exist

User · Answer

Got the same error when tried to export a large Excel file   150 000 rows  Fixed with the following code  Application xlApp   new Application    xlApp DefaultSaveFormat   XlFileFormat xlOpenXMLWorkbook

User · Answer

Adding one more possible issue causing this  the formula was wrong because I was using the wrong list separator according to my locale   Using CultureInfo CurrentCulture TextInfo ListSeparator  corrected the issue    Note that the exception was thrown on the following line of code

User · Answer

I was getting the same error but it s sorted now  In my case  I had columns with the heading  quot Key1 quot    quot Key2 quot   and  quot Key3 quot   I have changed the column names to something else and it s sorted  It seems that these are reserved keywords  Regards  Mahesh

User · Answer

Got same error in this line   Object temp   range Cells i  0  Value    Solved with non-zero based index   Object temp   range Cells i  1  Value    How is it possible that the guys who created this library thought it was a good idea to use non-zero based indexing

User · Answer

I got this error when calling this code  wks Range startCell  endCell  where the startCell Range and endCell Range were pointing to different worksheet then the variable wks

User · Answer

I know this is old but just to pitch in my experience  I just ran into it this morning  Turns our my error has nothing to do with  xls line limit or array index  It is caused by an incorrect formula   I was exporting from database to Excel a sheet about my customers  Someone fill in the customer name as  90Erickson-King and apparently this is fine as a string-type field in the database  however will result in an error as a formula in Excel  Instead of showing  N A like when you re using Excel  the program just froze and spilt that 0x800A03EC error a while later   I corrected this by deleting the equal sign and the dash in the customer s name  After that exporting went well   I guess this error code is a bit too general as people are seen reporting quite a range of different possible causes

User · Answer

Go to Excel Options   Save   Save Files in this format   Select  Excel Workbook   xlsx    This problem occurs if you are using an older version of excel file   xls  instead of  xlsx  The older version does not allow more than 65k rows in the excel sheet   Once you have saved as  xslx  try executing your code again   edit ----  Looking more into your problem  it seems that the problem might be locale specific  Does the code work on another machine  What value does the cell have  Is it datetime format  Have a look here   http   support microsoft com kb 320369  http   blogs msdn com b eric carter archive 2005 06 15 429515 aspx

User · Answer

This must be the world s most generic error message because I got it today on the following command using Excel Interop   Excel WorkbookConnection conn  conn ODBCConnection Connection    DSN myserver      What fixed it was specifying ODBC in the connection string   conn ODBCConnection Connection    ODBC DSN myserver      On the off chance anyone else has this error  I hope it helps

User · Answer

I got the same error whilst using Excel 2003 DLLs and trying to write to the 257th column  Excel 2003 limits maximum column per worksheet to 256  thus raising this exception   For detailed limitations of Excel 2003  see http   office microsoft com en-001 excel-help excel-specifications-and-limits-HP005199291 aspx  Starting from Excel 2007  column limitation is increased to 16384 columns  see http   office microsoft com en-001 excel-help excel-specifications-and-limits-HP010073849 aspx

[c#] Exception from HRESULT: 0x800A03EC Error

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