Modules & VBA :: DLookup Gives Invalid Use Of Null Error
Aug 11, 2014
The basic idea is that I need to insert a record into a table and then return the Key field so that I can use it to populate another table. This was working just fine for a while, then it stopped and naturally I can't think of anything I did to make it not work. I get an Invalid Use of Null error at the bolded step.
Dim SQL As String
Dim SpecID As Long
Dim VerifySpec As Variant
' Check for empty strings
If Len(Me.txtNewPartNumber & vbNullString) = 0 Then
Response = MsgBox("Part Number cannot be blank.", vbExclamation, "Missing Data")
Exit Sub
End If
Private Sub Form_Current() Dim strTime As String Dim strHour As String Dim strMinute As String If (CollectionTime.Value) = "" Then MsgBox CollectionTime
The following code works fine until it gets to last record, then it give me Error # 94 Invalid use of null. I have searched all of my code and null is not in the code.
Code: '-------------------------------------------------------- ' Goes to next record '--------------------------------------------------------- Private Sub cmdNext_Click() On Error GoTo err_handler ' DoCmd.GoToControl (txtNameL) ' DoCmd.GoToRecord , , acNext
i have these code to auto generate member number but the highlighted line generate error 94 - invalid use of NULL:
Private Sub cmdGetNumb_Click() 'On click of button a new Member Number is generated and 'focus is moved to tFName field. Me![nMembNum] = NewMembNum() Me![tFName].SetFocus 'Prevent accidental click Me![cmdGetNumb].Enabled = False
I am struggling trying to execute a function inside a Form_current event to display some stats.
The Function is this:
Code: Function FlightsByAircraft(Aircraft As Long) As Long Dim rst As DAO.Recordset Dim dbs As DAO.Database Dim str As String str = "SELECT * FROM tblFlights WHERE AircraftID = " & Aircraft
[Code] ....
The code for the Form_Current event is this:
Private Sub Form_Current() txtStats1 = FlightsByAircraft(Me.AircraftID)
Very simple. Well, the problem is when I move to a new record, a error message comes up: "Run-time error '94' - Invalid use of Null". It is because the AircraftID is not populated at that time. I tried to insert in the function code something like that:
Code: If IsNull(Aircraft) then exit function else .... (the DAO.Recordset code)
It might be an easy one but I just wasted the past hour deciphering through my code in order to solve the run-time error '94' that I'm getting when trying to execute the following code:
Code: Private Sub cmdUpdateDates_Click() '################################### 'This sub aims at combining the timesheet date and the start and end time into the fields [Start Time] and [End Time]. '################################### Dim intCounter As Integer intCounter = 0 Dim rs As ADODB.Recordset
SELECT Payment_Mth, CDate(Payment_mth) AS Expr1 FROM Table1 WHERE (((Payment_Mth) Is Not Null And (Payment_Mth)<>"Does not apply" And (Payment_Mth)<>""));
I get a set of data along the following lines September 2007 01/09/2007 October 2007 01/10/2007 September 2007 01/09/2007 etc. which is what I want.
However, when I try to filter to show only a particular date, I get an error
SELECT Payment_Mth, CDate(Payment_mth) AS Expr1 FROM Table1 WHERE (((Payment_Mth) Is Not Null And (Payment_Mth)<>"Does not apply" And (NBReferral.Payment_Mth)<>"") AND ((CDate(Payment_mth))=#01/10/2007#));
I have found the error leads to this line but how can i stop the error?
Run-time error '94': Invalid use of Null.
Option Compare Database Option Explicit Dim Msg As VbMsgBoxResult Dim StartText As Long Dim TextToFind As String Dim TextToBeSearched As String Private Sub Form_Current()
I am developing a database for my company which will produce reports based on data entered on various forms.
When the report opens, I would like its name to dynamically change to include the site, the client and their reference number. Although I know very little VBA, from searching this and other forums I have managed to get this to work on other forms.
On a different form, I have managed this by giving the form the caption "Caption" and then running the following code on load:
However all this produces is "Property Assessment for , reference". If I try entering just "[SiteDetailsAddressLine1]", "[ClientDetailsName]" or "[PropertyAssessmentClientJobNumber]" I receive an Invalid use of Null error message.
If I create text boxes on the report for [SiteDetailsAddressLine1], [ClientDetailsName] and [PropertyAssessmentClientJobNumber] they are filled with the correct information so I know that these fields are not blank.
I am using the following code (Sendobject) to create a PDF of a report and send it via email to a customer's email address.
Private Sub EmailWorkOrderQuote_Click() On Error GoTo Err_EmailWorkOrderQuote_Click Dim stDocName As String Dim mFilename As String Dim mEmailAddress As String
[Code] ....
It works fine except that the I want to to able to utilize the ability to send the email with either both the CC and BCC or either or neither as well.
I have a table called "My Company Information" that contains the email addresses for the CC and BCC. If I have values in these fields, everything works great! If I have no values in either of these fields, I get "Invalid use of Null"....
I want to be able to use either both CC and BCC, either CC or BCC, or neither used and it still work.
I am trying to run this code but getting a run time error 94 - null value - when it shouldn't be.I am thinking I have written the Dlookup incorrectly?
Code: Private Sub txtProductName_Click() Dim iProdType As Integer Dim ProductID As Integer iProdType = DLookup("ProductTypeID", "tblProduct", "ProductID" = Forms![frmBooking]![cboProductID].[Value]) Note ProductID in an integer
How can I diagnose this or what could the solution be?
I use access occasionally . How to find out why the Invalid Qualifier error keeps occuring. This is the code, and I've highlighted the line where it says its invalid qualifier:
Private Sub BtnAddBooking_Click() Dim CustomerID As String Dim StaffID As String Dim intPos As Integer Dim strSQL As String
main - [Welders fm], 2nd level - [PipingQualificationTickets tbl Subform] 3rd level - [WelderWps fm] This is a pop up form but is related to the 2nd level formVBA Error
I have a dropdown box [Wps] (3rd Level PopUp) with an after update function to lookup a query [DLookUpWeldWPS Qy] and insert the text into [Wps(s)QualifiedFor] on the 2 level [PipingQualificationTickets tbl Subform]
Connecting Access FE to SQL SERVER BE Connection is fine. I can open and close it and other queries work fine. I have only one problem with the SQL in one query
Code: With rstRPT If FirstRecord = True Then .Open "SELECT Min([" & SourceTbl & "].[3Order ID]) AS MinOf3OrderID " & _
[Code].....
why it wants to see the variable as a column name?
Hi, I have some problem with assigmnet with date and string variable. what i wana do is get data from Forms textboxes into variable and then by insert query send to history table.
the problem occurs when there is blank textbox its says invalid use of null.
I am trying to check for when a user trys to enter a duplicate number.
The control that I am checking is in a subform on the main form:
Main: frmCandidateInfo Sub: frmTestInfo
Control on the subform is: RankOrder
I am trying to check the control entry against the table entry:
Table: tblTestEvents Field: RankOrder
Here is what I have:
Code: Private Sub RankOrder_BeforeUpdate(Cancel As Integer) Dim lngRankDup As Long lngRankDup = Nz(DLookup("[RankOrder]", "tblTestEvents", "[RankOrder]=" & Forms!frmCandidateInfo!sfTestInfo!Form!RankOrder, 0)) If lngRankDup <> 0 Then MsgBox TestEventID & " already exists in the database" End If End Sub
I know that the error is due to the argument not being correct, but I am not sure how to fix it.
I have been trying to find a solution to why I can't get a Dlookup with multiple criteria to return the value I need.
Essentially I am trying to use an Order Number to find the item number which is contained within another table. However the order number has multiple lines (suffixes) which alter the item number. Therefore I am trying to have the item number be populated by the correct 'combination' of Order Number and line ("suffix").
I have managed to use the Dlookup in the after update of each box of the form separately and they retrieve values in the table correctly:
Afterupdate of main order number:
Code:
Private Sub OrderNumbertxt_AfterUpdate() ItemNumbertxt = DLookup("item", "dbo_job", "[job] = '" & Forms![**INPUT]![OrderNumbertxt] & "'") End Sub
Afterupdate of suffix:
Code:
Private Sub SuffixTxt_AfterUpdate() ItemNumbertxt = DLookup("item", "dbo_job", "[suffix] = Forms![**INPUT]![SuffixTxt]") End Sub
However when I combine them as follows in the afterupdate of the Suffix box I receive a "Run-time error '13': Type mismatch"
Code:
Private Sub SuffixTxt_AfterUpdate() ItemNumbertxt = DLookup("item", "dbo_job", ("[suffix] = Forms![**INPUT]![SuffixTxt]") And ("[job] = '" & Forms![**INPUT]![OrderNumbertxt] & "'")) End Sub
I think the reason is something to do with some being numbers and some being a combination of text and numbers (based on the replies of other topics), but have been trying to modify these slightly and can't get it to work still.
Also the Order Number is a combination of letters and numbers (normally in the form of AB12345678), the suffix is just a number between 0-9 and the Item number it finds is a combination of numbers and letters.
I did a quick search and really didn't find anything related to this. Though, I'm sure it's pry happened before.
I have started work on a new front end and have several linked tables to our back end. As well as copies of them for the purpose of the front end. On load the backend tables update the front ends tables, and on exit the front end tables append/update the back end tables.
I began work on a data entry form for fields residing in the front end tables and found that when I attempted to make a command button for the purpose of record navigation I received the error "Invalid Use of Null" and all of my options were empty (Concerning the control functions) and everytime I changed action categories i recieve the same error.
Also, I tried to work around it with a combo box for searching, only I don't have the option available to make it search.
So . . . I tried to circumvent with an unbound text box that performed a macro searchforrecord but I receive and error that the table I'm search within is not open.
Any clues would be great, any fix would be immaculate. I'm a bit flabbergasted.
I have a left-join query where I know that some of the values in the left-hand table have no corresponding values in the right-hand table...that's why I used a left-join: I want all the values in the left-hand table to show up. I would expect that records without corresponding values in the right-hand table would show up as nulls (I swear I have dozens of other queries that work this way) but in this one, they show up as "#error" instead.
This is a problem because I want to do some calculations on this field. Normally I would use the nz function to change the nulls to zeros.
So, 1. Any idea why this is happening? 2. Is there a way to change the #error values to zeroes, similar to using the nz function?
HEre's the SQL: SELECT FeederInventorySummary.machine, FeederInventorySummary.Size, FeederInventorySummary.Leaf, FeederInventorySummary.Type, FeederInventorySummary.CountOfFeederID, FeederNeedsSummary_7.FeederQty FROM FeederInventorySummary LEFT JOIN FeederNeedsSummary_7 ON (FeederInventorySummary.Type = FeederNeedsSummary_7.Type) AND (FeederInventorySummary.Leaf = FeederNeedsSummary_7.Leaf) AND (FeederInventorySummary.Size = FeederNeedsSummary_7.FeederSize) AND (FeederInventorySummary.machine = FeederNeedsSummary_7.ActualMachine);
For every record without a corresponding record in FeederInventorySummary_7, the FeederQty field shows up as #error.
I have a form that runs a simple macro. The problem is I'm getting the "Invalid Use Of Null" error becuase some of the fields are empty. There are 12 fields....one for each month. I know there's a way to use the nz function but I do not know how and where to apply it for each field.
I've got this line of code under my form_current() envent (frmEmails)
str2 = Forms!frmMain!txtSQL.Value
but when I start the DB I get the Invalid use of Null error,
now, it seems that I need to define my txtSQL.value = "" but am not sure where. I've tried under frmMain_load event but it seems that's not the right spot...
is it problem that I had put that code on form_current() or is that OK and I just need to define my txtSQL.valuse somewhere else.
Hi, I have some code that runs on Form_Load() It basically uses a case statement to say if a value in a combo box equals one set of values then make somethings visible and invisible, and for all other values make some other things visible and invisible.
The problem I have is that I have defined the variable as a String and if the combo box does not yet have a value when it loads, which is quite likely then it will return an error - "Invalid Use of Null".
I have an unbound form with unbound controls that I am using for data-entry.
One of the controls, bEntry, is a checkbox. I have tried setting the default value to both false and to 0. Somehow, it doesn't take and so remains Null.
I have the following code running as part of the save routine. It gives me an "invalid use of null" whenever it reaches the highlighted text
Code:Dim Entry_B As ByteDim EntryCheckbox As BooleanEntryCheckbox = Me.bEntry.ValueIf EntryCheckbox = True ThenEntry_B = "1"ElseEntry_B = "0"End If
I have also tried changing it to say If Me.bEntry.Value < 1 Then etc.
