Concatenate LineNo

[shank]

I've been trying to take advantage of a function created by Allen Browne posted below. I need to concatenate LineNo per each PoNo. I'm aware I will have issues converting a number field into a text result with 3 digits. But I can't seem to get out the gate with an error I understand. I think I'm providing all elements required but getting he below errors. What am I missing?

Thanks!

Error 3061: Too few parameters. Expected 1.
Error 3464: Data type mismatch in criteria expression.

SELECT DISTINCT
[PoNo],
ConcatRelated([Order Import]![LineNo],
"[Order Import]",
"[PoNo] = " & [PoNo],
"[Order Import]![LineNo]",
"/"
) AS LineNo
FROM [Order Import];



Table: [Order Imports]
PoNo - text
LineNo - number

PoNo	LineNo
A100	1
A200	23
A200	25
A300	1
A300	30
A300	234
A400	4
A400	56
A400	78
A400	456

Desired Query Results:

PoNo	LineNo
A100	001
A200	023/025
A300	001/030/234
A400	004/056/078/456

Public Function ConcatRelated(strField As String, _
    strTable As String, _
    Optional strWhere As String, _
    Optional strOrderBy As String, _
    Optional strSeparator = ", ") As Variant
On Error GoTo Err_Handler
    'Purpose:   Generate a concatenated string of related records.
    'Return:    String variant, or Null if no matches.
    'Arguments: strField = name of field to get results from and concatenate.
    '           strTable = name of a table or query.
    '           strWhere = WHERE clause to choose the right values.
    '           strOrderBy = ORDER BY clause, for sorting the values.
    '           strSeparator = characters to use between the concatenated values.
    'Notes:     1. Use square brackets around field/table names with spaces or odd characters.
    '           2. strField can be a Multi-valued field (A2007 and later), but strOrderBy cannot.
    '           3. Nulls are omitted, zero-length strings (ZLSs) are returned as ZLSs.
    '           4. Returning more than 255 characters to a recordset triggers this Access bug:
    '               http://allenbrowne.com/bug-16.html
    Dim rs As DAO.Recordset         'Related records
    Dim rsMV As DAO.Recordset       'Multi-valued field recordset
    Dim strSql As String            'SQL statement
    Dim strOut As String            'Output string to concatenate to.
    Dim lngLen As Long              'Length of string.
    Dim bIsMultiValue As Boolean    'Flag if strField is a multi-valued field.
    
    'Initialize to Null
    ConcatRelated = Null
    
    'Build SQL string, and get the records.
    strSql = "SELECT " & strField & " FROM " & strTable
    If strWhere <> vbNullString Then
        strSql = strSql & " WHERE " & strWhere
    End If
    If strOrderBy <> vbNullString Then
        strSql = strSql & " ORDER BY " & strOrderBy
    End If
    Set rs = DBEngine(0)(0).OpenRecordset(strSql, dbOpenDynaset)
    'Determine if the requested field is multi-valued (Type is above 100.)
    bIsMultiValue = (rs(0).Type > 100)
    
    'Loop through the matching records
    Do While Not rs.EOF
        If bIsMultiValue Then
            'For multi-valued field, loop through the values
            Set rsMV = rs(0).Value
            Do While Not rsMV.EOF
                If Not IsNull(rsMV(0)) Then
                    strOut = strOut & rsMV(0) & strSeparator
                End If
                rsMV.MoveNext
            Loop
            Set rsMV = Nothing
        ElseIf Not IsNull(rs(0)) Then
            strOut = strOut & rs(0) & strSeparator
        End If
        rs.MoveNext
    Loop
    rs.Close
    
    'Return the string without the trailing separator.
    lngLen = Len(strOut) - Len(strSeparator)
    If lngLen > 0 Then
        ConcatRelated = Left(strOut, lngLen)
    End If

Exit_Handler:
    'Clean up
    Set rsMV = Nothing
    Set rs = Nothing
    Exit Function

Err_Handler:
    MsgBox "Error " & Err.Number & ": " & Err.Description, vbExclamation, "ConcatRelated()"
    Resume Exit_Handler
End Function

[CJ_London]

aware I will have issues converting a number field into a text result with 3 digits

use the format function

PONo & "/" & format(LineNo,"000")

will provide preceding zeros for numbers 0-99

[shank]

Thanks! That helped my number to text plus zeroes issues.
But I still get the error:
Error 3061: Too few parameters. Expected 1.
I'm guessing I'm not providing enough elements, but not seeing what I'm missing.
Thoughts?

SELECT DISTINCT [Order Import].PoNo, ConcatRelated([Order Import]![LineNo],"[Order Import]","[PoNo] = " & [PoNo],Format([Order Import]![LineNo],"000"),"/") AS LineNo
FROM [Order Import];

[orange]

Try

SELECT DISTINCT [Order Import].PoNo
, concatrelated("Format(LineNo,'000')","[Order Import]","POno  ='" & [PoNo] & "'","","/") AS ConcatLineNo
FROM [Order Import];

PoNo	ConcatLineNo
A100	001
A200	023/025
A300	001/030/234
A400	004/056/078/456

I have found that if you want to ignore the 4th parameter, and supply a different separator as parameter 5, you have to supply a ZLS for parameter 4 (as shown in the SQL above).

[shank]

Very much appreciated! This worked:

SELECT DISTINCT [Order Import].PoNo, ConcatRelated("Format(LineNo,'000')","[Order Import]","PoNo ='" & [PoNo] & "'","","/") AS LineNo
FROM [Order Import];

[orange]

Happy to help.