I have a Product Name like this. I run vba code for extracting date, am not getting the result, it shows error - excel

Question

Code:
Sub My_Date()
Dim endRow As Long
endRow = Cells(rows.Count, "B").End(xlUp).row
ActiveCell.FormulaR1C1 = _
"=DATEVALUE(IF(LEFT(RIGHT(LEFT(RC[1],FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),5))-1),FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),5))-FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),4))-1),3)=TEXT(TODAY()-1,""Mmm""),RIGHT(LEFT(RC[1],FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),5))-1),FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),5))-FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHA" & _
"-1),IF(LEFT(RIGHT(LEFT(RC[1],FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),6))-1),FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),6))-FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),5))-1),3)=TEXT(TODAY()-1,""Mmm""),RIGHT(LEFT(RC[1],FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),6))-1),FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),6))-FIND(CHAR(1),SUBSTITUTE(RC[1],""_"",CHAR(1),5)" & _
""")))"
range("B2").Autofill Destination:=range("B2:B" & endRow)
End Sub

Answer 1

You could write your own function.
This will split your text by the _ delimiter and return the bit that can be turned into a date.
Sub Test()
Dim endRow As Long
With ThisWorkbook.Worksheets("Sheet1")
endRow = .Cells(.Rows.Count, 2).End(xlUp).Row
.Range(.Cells(2, 1), .Cells(endRow, 1)).FormulaR1C1 = "=ExtractDate(RC2)"
End With
End Sub
Public Function ExtractDate(Target As Range, Optional Delim As String = "_") As Variant
Dim SplitText As Variant
SplitText = Split(Target, Delim)
Dim Itm As Variant
For Each Itm In SplitText
If IsDate(Itm) Then
ExtractDate = CDate(Itm)
Exit For
End If
Next Itm
'If no date found return an #N/A error.
If ExtractDate = 0 Then ExtractDate = CVErr(xlErrNA)
End Function
The cell reference in the Test procedure "=ExtractDate(RC2)" is in the R1C1 format - it means this row (where the formula appears), column 2.

Answer 2

The solution proposed by Darren Bartrup-Cook has a serious pitfall: IsDate and CDate functions work with the month names in a current locale. Which means that in general case they do not recognize May 03 and alike as a date
Let's make it work. Here are the assumptions about our data:
There's a pattern in Product Names with _ as a delimiter: the date always comes sixth in a row.
The year is always meant to be the current one.
The name of the month is always indicated in full.
Function ExtractDate(Text As String)
Const Delimiter = "_"
Const Position = 5 ' starting from zero
ExtractDate = Split(Text, Delimiter)(Position)
End Function
Sub Main_Macro()
Dim Source As Range
Dim DateArea As Range
Set Source = Range(Range("B2"), Range("B2").End(xlDown))
Set DateArea = Source.Offset(0, -1)
With DateArea
.NumberFormat = "[$-409]mmmm d"
.Formula2R1C1 = "=ExtractDate(RC[1])"
.Value2 = .Value2
.NumberFormat = "dd-mm-yyyy"
End With
End Sub
Here:
"[$-409]mmmm d" force to recognize months in English
.Value2 = .Value2 replace the formula with real data
.NumberFormat = "mm-dd-yyyy" set the date format in a current locale