NotImplementedException when setting IRange.Text

Here's the code:

something like this loops in a for loop:

------
sheet.Range(currRow, currCol).Text = "company - costcenter (dep)"
sheet.Range(currRow, currCol).CellStyle.Font.Bold = True
sheet.Range(currRow, currCol).AutofitColumns()
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This is the stack trace:

[NotImplementedException: The method or operation is not implemented.]
Syncfusion.XlsIO.Implementation.Collections.RowStorage.EnsureSize(Int32 iRequiredSize, Int32 iBlockSize) +63
Syncfusion.XlsIO.Implementation.Collections.RowStorage.SetOrdinaryRecord(Int32 iColumnIndex, ICellPositionFormat cell, Int32 iBlockSize) +525
Syncfusion.XlsIO.Implementation.Collections.RowStorage.SetRecord(Int32 iColumnIndex, ICellPositionFormat cell, Int32 iBlockSize) +64
Syncfusion.XlsIO.Implementation.Collections.RecordTable.set_Item(Int32 rowIndex, Int32 colIndex, Object value) +245
Syncfusion.XlsIO.Implementation.Collections.CellRecordCollection.set_Item(Int32 iRow, Int32 iColumn, ICellPositionFormat value) +76
Syncfusion.XlsIO.Implementation.Collections.CellRecordCollection.SetCellRecord(Int32 iRow, Int32 iColumn, ICellPositionFormat cell) +37
Syncfusion.XlsIO.Implementation.WorksheetImpl.SetLabelSSTIndex(Int64 cellIndex, Int32 iSSTIndex) +459
Syncfusion.XlsIO.Implementation.RangeRichTextString.EndUpdate() +142
Syncfusion.XlsIO.Implementation.RangeImpl.set_Text(String value) +291

Hi Bert,

I am not sure of what might be causing this strange behavior without a working sample. I have tested this issue in a simple application with Essentail XlsIO V.5.2. But i was not able to reproduce the issue. I have attached my test sample.

http://websamples.syncfusion.com/samples/Grid.Windows/38539/main.htm

Is it possible for you to upload us a minimal sample or modify the attached sample to reproduce the issue here? This will help us to analyse the issue further.

Thanks for using Syncfusion product.

Best regards,
Haneef