Acrobat won't release a file

Question

Everyone,
I'm using visual basic to manipulate a pdf file opened in Acrobat. The code below opens the file and searches for a text string. If it finds the text string, the pages containing are deleted. Once the text string is no longer found, the file is closed, the application is hidden and then exited. All of this works just fine.
My problem occurs with the last line of code. I want to rename the file and place it in another directory. However, I get a file path error which indicates to me that Acrobat is still holding on to the recently closed file.
Is there a method to get Acrobat to release the file? Any help is appreciated.
MikeCJ
Dim pdfAcroExchApp As Acrobat.AcroApp
Dim pdfAVDoc As Acrobat.AcroAVDoc
Dim pdfPDDoc As Acrobat.AcroPDDoc
Dim pdfPath, sText As String
Dim foundText, Rsp, x As Integer
Dim check As Boolean
'Check establishes whether an MSDS has a chemical Evaluation form attahced.
check = True
Do While check = True
    'If the text string frmChemEval is found it is a certainty the MSDS file contains a Chemcial Evaluation Form
    sText = "frmChemEval"
    pdfPath = "Q:\" & Form_frmControlPanel.fldautoMSDSNbr & ".pdf"
    'set pdfAVDoc for searching
    Set pdfAcroExchApp = CreateObject("AcroExch.App")
    Set pdfAVDoc = CreateObject("AcroExch.Avdoc")
    pdfAVDoc.Open pdfPath, ""
    pdfAcroExchApp.Show
    Set pdfPDDoc = pdfAVDoc.GetPDDoc
    Set pdfPDDoc = CreateObject("AcroExch.PDDoc")
    pdfPDDoc.Open pdfPath
    x = pdfPDDoc.GetNumPages
    foundText = pdfAVDoc.FindText(sText, 0, 1, 1)
        If foundText = -1 Then
            check = True
        Else
            check = False
        End If
        If check = True Then 'The MSDS already contains a Chemical Evaluation Form
                pdfPDDoc.AcquirePage pdfPDDoc.GetNumPages - 1
                pdfPDDoc.DeletePages pdfPDDoc.GetNumPages - 1, pdfPDDoc.GetNumPages - 1
        End If
Loop
pdfPDDoc.Close
pdfAcroExchApp.Hide
pdfAcroExchApp.Exit
Name (pdfPath) As ("Q:\MSDS Temp\MSDStoMerge.pdf")

Answer 1

Bernd,
It was an omission on my part. I've included a save statement just before the close statement. Any thoughts of the "releasing" issue?
Thanks,