Dlookup Run Time Error 94
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Runtime Error 94 Invalid Use Of Null
Markdown MediaWiki reStructuredText code below into your site. VBA Visual Basic for Applications (Microsoft) Forum at Tek-Tips HomeForumsProgrammersLanguagesVBA Visual Basic for Applications (Microsoft) Forum Dlookup getting Run time error '94' Invalid use of nulls thread707-1630230 Forum Search FAQs Links MVPs Dlookup getting Run time error '94' Invalid use of nulls Dlookup getting Run time error '94' Invalid use of nulls smsmail (Programmer) (OP) 6 Dec 10 10:23 Hi I run time error 94 invalid use of null solution am getting a run time error on the dlookup code, because no record meet the criteria, therefore the dlookup returned a null value.[code]Dim lngLogID As LonglngLogID = DLookup("[LogID]", "Download_Log", "[JobNumber] = '" & Me.JobNumber & "' and [ClientID]= " & Me.clientid)Debug.Print lngLogIDIf Not IsNull(lngLogID) ThenDoCmd.OpenForm "frmdownloadlog", , , "logid = " & lngLogID, acEditElseDoCmd.OpenForm "frmdownloadlog", , , , acEditEnd If[code/]Is there a simple way of handling this?Thanks for your help RE: Dlookup getting Run time error '94' Invalid use of nulls MajP (TechnicalUser) 6 Dec 10 10:37 dlookup returns a Null if not found.You cannot assign a long variable to nullDim lngLogID As variant RE: Dlookup getting Run time error '94' Invalid use of nulls MajP (TechnicalUser) 6 Dec 10 10:38 you can also wrap the dlookup in a null to zero (NZ) functionlngLogID = NZ(DLookup("[LogID]", "Download_Log", "[JobNumber] = '" & Me.JobNumber & "' and [ClientID]= " & Me.clientid),0)...If lngLogID <> 0 Then RE: Dlookup getting Run time error '94' Invalid use of nulls smsmail (Programmer) (OP) 6 Dec 10 11:05 Thanks MajP.Your help is very much appreciated~! RE: Dlookup getting Run time error '94' Invalid use of nulls MajP (TechnicalUser) 6 Dec 10 11:23 FYIQuote (Access Help file, Dlookup Return):Although criteria is an optional argument, if you don't suppl
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How To Fix Runtime Error 94 Invalid Use Of Null
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Run Time Error 94 Invalid Use Of Null Excel
do I fix runtime error 94, "invalid use of null", in VBA Ms Access? Microsoft Office for Developers > Access for Developers Question 0 Sign in to vote Here is the code: Result = DLookup("[Department Name]", http://www.tek-tips.com/viewthread.cfm?qid=1630230 "Departments", _ "[Department Name]='" & NewData & "'") If IsNull(Result) Then Response = acDataErrContinue MsgBox "Please try again. This is blank!" Else: Response = acDataErrAdded End If The underline part is the one that is highlighted when the error occurs. Thursday, December 13, 2012 7:46 PM Reply | Quote Answers 0 Sign in to vote What is the data type of Result variable? To accept Nulls it https://social.msdn.microsoft.com/Forums/office/en-US/63e845d7-560d-4a49-917a-dda3a589b59e/how-do-i-fix-runtime-error-94-invalid-use-of-null-in-vba-ms-access?forum=accessdev should be Variant. Using Variant until you really need it is not a good idea. So I propose to eliminate Nulls at the beginning and then test a string value. Result = Nz(DLookup("[Department Name]", "Departments", _ "[Department Name]='" & NewData & "'")) If Result = vbNullString Then Response = acDataErrContinue MsgBox "Please try again. This is blank!" Else: Response = acDataErrAdded End If Andrey V Artemyev | Saint-Petersburg, Russia Russian blog artemyev.biztoolbox.ru Marked as answer by Bon qui qui Friday, December 14, 2012 3:07 PM Thursday, December 13, 2012 7:53 PM Reply | Quote All replies 0 Sign in to vote What is the data type of Result variable? To accept Nulls it should be Variant. Using Variant until you really need it is not a good idea. So I propose to eliminate Nulls at the beginning and then test a string value. Result = Nz(DLookup("[Department Name]", "Departments", _ "[Department Name]='" & NewData & "'")) If Result = vbNullString Then Response = acDataErrContinue MsgBox "Please try again. This is blank!" Else: Response = acDataErrAdded End If Andrey V Artemyev | Saint-Petersburg, Russia Russian blog artemyev.biztoolbox.ru Marked as answer by Bon qui qui Friday, December 14, 2012 3:07 PM Thursday, December 13, 2012 7:53 PM Reply | Quote 0 Sign in to vote Try: Result
Custom Search UtterAccess Forums>Microsoft® Access>Access Errors + Error Handling Run-time Error '94' Invalid Use Of Null - All Of http://www.utteraccess.com/forum/index.php?showtopic=1994431 Sudden Appears, Access 2007 Forum HomeSearchHelpUA Messages|-- UtterAccess.com NewsAccess Knowledge Center|-- Access Code Archive|-- Access Knowledgebase / FAQ|-- Access TutorialsMicrosoft® Access|-- Local Access User http://www.pcreview.co.uk/threads/run-time-error-94-invalid-use-of-null.1635685/ Groups (AUGs)|-- Interface Design|-- Access Q and A|-- Access Tables + Relationships|-- Access Queries|-- Access Forms|-- Access Reports|-- Access Macros|-- Access Modules|-- Access Date + time error Time|-- Access Errors + Error Handling|-- Access Built-in Functions|-- Access Searching + Data Mining|-- Access Records|-- Access Security|-- Access Automation|-- Access Database Container|-- Tool bars, Menu bars + Ribbon|-- Access Services (Web Databases)|-- Access Data Access Pages (Deprecated)|-- Access Data Projects - ADP|-- Access Runtime, Packaging & DeploymentAnd More...|-- Microsoft time error 94 SQL Server|-- SQL Server Reporting Services|-- Microsoft SharePoint|-- Microsoft Internet Explorer|-- Visual Basic 6 and Earlier|-- Visual Basic 2003 and Later|-- ASP and VBScript|-- Web Development|-- PHP, Perl, MySQL and Postgres|-- Other Database Engines|-- BI Tools and Applications|-- JAVA and C#|-- GraphicsMicrosoft® Office|-- Microsoft Excel|-- Microsoft Excel FAQs|-- Microsoft Word|-- Microsoft Outlook|-- Microsoft PowerPoint|-- Microsoft FrontPage/Exp. Web|-- Other Microsoft ProductsPC|-- Network Issues|-- Q & A - Hardware|-- Q & A - Software|-- Q & A - Other PC|-- Virus + Security DiscussionUtterAccess Odds and Ends|-- General Chat|-- Q & A - UtterAccess.com Forums|-- Q & A - Access Wiki Options imchazView Member Profile Oct 8 2012, 11:02 AM Post#1Posts: 47Joined: 4-August 10From: Springfield, ILFor some reason, this error appears: Run-time error '94' Invalid use of NullThis has all of the suddenly appeared and nothing has changed. Here is the following code below.!--c1-->CODEPrivate Sub SummarizeIntrastateFilersElectionStatus()Dim db As DAO.DatabaseSet
error when I use dlookup Run-time error '94': Invalid use of Null When i do Test(1) a record is found and there is no problem. When i do Test(2) no records are found and it results in error 94. This problem began when I added the column isDefault with datatype yes/no to a table and added " AND isDefault=-1" to the criteria of Dlookup Can anybody tell me why this happens and give me a solution to this problem? thanx in advance Below you find the function and table definitions. ### Function Test94 ### Function Test94(pCategoryId) As String Dim criteria As String 'find the default value for the given category criteria = "category_id=" & pCategoryId & " AND isDefault=-1" Test94 = DLookup("[id]", "lookupvalues", criteria) End Function ### Table definition lookupvalues ### lookupvalues (id autonumber primary key ,category_id number ,value text ,isDefault yes/no ) ### Table data ### id category_id value isDefault 1 1 "ok" Yes hoke, Dec 29, 2003 #1 Advertisements Scott McDaniel Guest DLookup will return a Null value if no record is found. Change your function like this: Function Test94(pCategoryId As Variant) As String Dim varResults As Variant 'find the default value for the given category varResults = DLookup("[id]", "lookupvalues", "category_id=" & pCategoryId & " AND isDefault=-1" If Not Isnull(varResults) Then Test94 = cstr(varResults) Else Test94 = "" 'empty string End If End Function Of course, you may not want to return an empty string ... you may wish to actually return a null value, in which case you'd have to declare the return value of your function to be a Variant, and just set the value = varResults. "hoke" <> wrote in message news:087701c3ce32$fdfe1640$... > I get the following error when I use dlookup > > Run-time error '94': Invalid use of Null > > When i do Test(1) a record is found and there is no > problem. > When i do Test(2) no records are found and it results in > error 94. > > This problem began when I added the column isDefault with > datatype yes/no to a table > and added " AND isDefault=-1" to the criteria of Dlookup > > Can anybody tell me why this happens and give me a > solution to this problem? > > thanx in advance > > Below you find the function and table definitions.