VB.net Excel Add-in Find Issue

When I put a value in column A and use the following Find code the system does not find it, but when I put the value in any other cell
eg G14 the system does find it. The cell isn't a merged cell so I can't work out why it doesn't find it

                                    Dim oFindRange As Microsoft.Office.Interop.Excel.Range              
                                    oFindRange = xWorkBook.Sheets(oUseSheet).Range("A1:Z1000").Find(What:=oDetail5, LookIn:=Excel.XlFindLookIn.xlValues, LookAt:=Excel.XlLookAt.xlPart)
                                    If oFindRange IsNot Nothing Then
                                        oFindAddress = oFindRange.Address
                                        MsgBox("'" & oDetail5 & "' not found in column 'A'")
                                    End If
Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAsked:
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David L. HansenCEOCommented:
Can you attach your spreadsheet here?
Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAuthor Commented:

Here it is

Rory ArchibaldCommented:
It's probably a formatting issue. Have you tried using@

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instead, if it's a literal value (that will ignore the formatting)

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Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAuthor Commented:
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