Run-time error 2501 when opening a form

can you open that form from DB container and edit records?

Can you post the database?  I can test it in Access versions from 2003 through 2013.

You could try stepping through the code on the form's Open event, and see if any specific line of code triggers the error.

I have been working on the Access dbase using some of the suggestions provided.  The following code is still not functional. I am unable to load the dbase (very exploded, large file) onto the site.  The dbase is loaded with old DoCMD.OpenForm code.  I believe the issue may be resulting in the condition " If Project count<>0 " based on John's observation.  This condition may not be necessary to open each of the types of forms listed.  Does this sound plausible as a solution.

.

Option Compare Database
Option Explicit
Dim ProjectCount As Integer

Private Sub cmdDETAIL_Click()
If IsNull([prmEmpNo]) Then
    MsgBox ("No employee selected.")
    [prmEmpNo].SetFocus
    Exit Sub
End If
ProjectCount = NoOfProjects
If ProjectCount <> 0 Then
    Forms![fPREPROJECT]![fProjectData].SetFocus
    ProjectCount = NoOfProjects
Else
    MsgBox ("Selection has no records.")
    Exit Sub
End If
Select Case prmProjectGroup
    Case "Complaints"
        If ProjectCount <> 0 Then DoCmd.OpenForm "fComplain01", acNormal, , , acFormEdit
    Case "Lab"
        If ProjectCount <> 0 Then DoCmd.OpenForm "fComplain01", acNormal, , , acFormEdit
    Case "ASBESTOS-INSP"
        If ProjectCount <> 0 Then DoCmd.OpenForm "fAsbInsp01", acNormal, , , acFormEdit
    Case "Inspect-PERM"
        If ProjectCount <> 0 Then DoCmd.OpenForm "fFacInsp01", acNormal, , , acFormEdit
    Case "Enforcement Cases"
        If ProjectCount <> 0 Then DoCmd.OpenForm "fEnforce01", acNormal, , , acFormEdit
    Case "Projects"
        If ProjectCount <> 0 Then DoCmd.OpenForm "fProject01", acNormal, , , acFormEdit
    Case "Permits"
        If ProjectCount <> 0 Then DoCmd.OpenForm "fPermRev01", acNormal, , , acFormEdit
    Case "Training"
        If ProjectCount <> 0 Then DoCmd.OpenForm "fTraining01", acNormal, , , acFormEdit
    Case Else
        MsgBox ("Type of Project selected does not have detail records.")
        Exit Sub
End Select
End Sub

Private Sub cmdExit_Click()
DoCmd.Echo False
Me.Visible = False
If (SysCmd(acSysCmdGetObjectState, A_FORM, "fAQSplashForm") = 0) Then
  DoCmd.OpenForm "fAQSplashForm"
End If
DoCmd.Echo True
End Sub

Private Sub cmdHELP_Click()
Call NavigHelp
End Sub


Private Sub cmdMemo_Click()

If [Forms]![fPREPROJECT]![fProjectData].Form.CurrentRecord <> 0 Then
    glbProjID = [Forms]![fPREPROJECT]![fProjectData].Form![ipProjID]
    [Forms]![fPREPROJECT]![FormLink1] = [Forms]![fPREPROJECT]![fProjectData].Form![ipProjID]
    DoCmd.OpenForm "fProjMemoPopup"
End If


End Sub



Private Sub Form_Activate()
'Me![fProjectData].SetFocus
'Me![fProjectData].Form![ipProjID].SetFocus
 '           .SelStart = intWhere - 1
'            .SelLength = Len(strSearch
End Sub

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
If KeyCode <> vbKeyF6 Then Exit Sub
KeyCode = 0
If (SysCmd(acSysCmdGetObjectState, A_FORM, "fAsbFac01") <> 0) Then
    Forms![fAsbFac01].SetFocus
ElseIf (SysCmd(acSysCmdGetObjectState, A_FORM, "fFacDetail01") <> 0) Then
    Forms![fFacDetail01].SetFocus
End If

End Sub

Private Sub Form_Open(Cancel As Integer)
Dim db As DAO.Database
Set db = CurrentDb()
'load the Rowsource for [prmEmpNo]
'code below performs a query and loads information
'from the EMPLOYEE table into the Rowsource
Dim EmpInfo As DAO.Recordset
Dim i As Integer
Dim qte
qte = Chr(34)
Dim prm As Parameter
Dim QD As DAO.QueryDef
    Set QD = db.QueryDefs("qCmbEmpInfo2")
For i = 0 To QD.Parameters.Count - 1
    Set prm = QD.Parameters(i)
    prm.Value = Eval(prm.Name)
Next i
Set EmpInfo = QD.OpenRecordset(dbOpenDynaset)
EmpInfo.MoveFirst
Do Until EmpInfo.EOF
    [prmEmpNo].RowSource = [prmEmpNo].RowSource & qte & EmpInfo![EmpInfo] & qte & ";" & qte & EmpInfo![Empl_No] & qte & ";"
EmpInfo.MoveNext
Loop
EmpInfo.Close
'this adds an additional entriy at the beginning of Rowsource
[prmEmpNo].RowSource = qte & "AllActive" & qte & ";" & qte & "Actv" & qte & ";" & [prmEmpNo].RowSource
'this adds additional entries to the end of Rowsource
[prmEmpNo].RowSource = [prmEmpNo].RowSource & qte & "TOXICS" & qte & ";" & qte & "tox" & qte & ";"
[prmEmpNo].RowSource = [prmEmpNo].RowSource & qte & "STATIONARY SOURCE" & qte & ";" & qte & "cmp" & qte & ";"
[prmEmpNo].RowSource = [prmEmpNo].RowSource & qte & "AllEmployees" & qte & ";" & qte & "AllEmployees" & qte & ";"
'sets values of startup parameter fields
Forms![fPREPROJECT]![prmProjectGroup] = "AllProjects"
Forms![fPREPROJECT]![prmOpenClosed] = 2
Forms![fPREPROJECT]![prmEmpNo] = "Actv"
DoCmd.Maximize
Me![fProjectData].SetFocus

End Sub



Private Sub grpOpenClosed_Click()
Call ResetParms
End Sub



Public Function NoOfProjects()
NoOfProjects = DCount("*", "qProjectData")
End Function

Private Sub Opt1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Call RedoSort(1)
'ME: added September 10, 2008
Call RedoSort(1)

End Sub

Private Function RedoSort(OptNo As Integer)
If Me.[grpOpenClosed] = OptNo Then
    Forms![fPREPROJECT]![fProjectData].Form.OrderBy = "[SortDate],  [Due Date], [Project Description]"
End If
'ME:  09/03/2008:  added the following for the Plan Date sorting-this is a test
If OptNo = 5 Then
    Forms![fPREPROJECT]![fProjectData].Form.OrderBy = "[SortDate], [Plan Date], [Project Description]"
End If
End Function

Private Sub Opt2_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Call RedoSort(2)
'ME: added September 10, 2008
Call RedoSort(2)
End Sub



Private Sub Opt3_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Call RedoSort(3)
'ME: added September 10, 2008
Call RedoSort(3)
End Sub


Private Sub Opt4_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Call RedoSort(4)
'ME: added September 10, 2008
Call RedoSort(4)
End Sub

Public Function ResetParms()
Call qProjectDataGen(Forms![fPREPROJECT], Forms![fPREPROJECT]![fProjectData].Form)
[Forms]![fPREPROJECT]![fProjectData].Requery
If [Forms]![fPREPROJECT]![fProjectData].[Form].[CurrentRecord] <> 0 Then
    Me![fProjectData].SetFocus
    Me![fProjectData].Form![ipProjID].SetFocus
End If
End Function

Private Sub Opt5_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Call RedoSort(5)
'ME: added September 10, 2008
Call RedoSort(5)
End Sub

Private Sub prmEmpNo_Click()
Call ResetParms

End Sub

Private Sub prmProjectGroup_Click()
Call ResetParms

End Sub

Select all Open in new window

Well maybe its time to upload a stripped down copy to check what is going on...

The new code worked and simplified the process.