#error In Access
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Editions: US United States Australia United Kingdom Japan Newsletters Forums Resource Library Tech Pro Free Trial Membership Membership My Profile People Subscriptions My stuff Preferences Send a message Log Out TechRepublic Search GO Topics: CXO Cloud #error in access report Big Data Security Innovation Software Data Centers Networking Startups Tech & Work All Topics #error in access query Sections: Photos Videos All Writers Newsletters Forums Resource Library Tech Pro Free Trial Editions: US United States Australia United Kingdom Japan #error in access query results Membership Membership My Profile People Subscriptions My stuff Preferences Send a message Log Out Microsoft Use Nz() to replace an error message in Access A missing value can lead to confusion by returning error values. ms access #error But a properly used Nz() function can turn an error message into an understandable and expected value. By Susan Harkins | in Microsoft Office, February 6, 2009, 2:14 AM PST RSS Comments Facebook Linkedin Twitter More Email Print Reddit Delicious Digg Pinterest Stumbleupon Google Plus Missing values can confuse users if handled incorrectly. For instance, a calculated control in a form or report has the potential to return #Error if a
Microsoft Access #error
value is missing. That's going to leave your users scratching their heads and reaching for the phone to ask what's up. You can avoid their confusion (and your interruption) by using the Nz() function to force a value — usually 0. This function's syntax is simple: Nz(expression, replacementvalue) where expression is the field or value being evaluated and replacementvalue is the value or text you want to display, or pass, when there's no value. (You can learn more about Nz() in Help.) I've found that applying Nz() correctly can be a bit of a puzzle for some folks. The key is to wrap every field or value in an Nz() function, not the entire expression. For instance, the following expression has the potential to return #Error, despite the Nz() function: =Nz(Sum(Price * Quantity, 0)) The correct syntax follows: =Sum(Nz(Price, 0) * Nz(Quantity, 0)) Wrap each field within the expression to catch each missing value before the SUM() function tries to evaluate it. Of course, the best solution is to prevent missing values in the first place. To do so at the table level, set the field's Required property to Yes. However, doing so isn't always appropriate or practical. That's when the Nz() function comes in handy — as long as
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Join Date: May 2008 Location: Calgary, Canada Posts: 9 Thanks: 0 Thanked 0 Times in 0 access error 2950 Posts Calculated field returning #Error I am making an application to track methanol usage in an oil and gas field throughout the winter access iserror months in Canada. I have a query set up to do several simple but time consuming calculations. There query determines the volume in the tank at the start of the fall based on a measurement, the volume in the http://www.techrepublic.com/blog/microsoft-office/use-nz-to-replace-an-error-message-in-access/ tank at the end of spring based on another measurement, and I would like it to determine the methanol usage over the time period. Since methanol may be added during the winter if the storage tanks get low I sometimes need to add a fixed number(s) to the difference of the two fall and spring volumes. The problem I am having is that not all the tanks get refilled during the winter months. I am using a http://www.access-programmers.co.uk/forums/showthread.php?t=191477 DSUM function to calculate the total amount of methanol added between the spring and fall dates. If the tanks don’t get refilled, the DSUM function appears to return a null or an empty entry, then when I add the three fields FallVolume, Spring Volume, and AddedMethanol, I get a #Error in the calculated field MethanolUsage. I have tried using IIf(Iserror([AddedMethanol], as well as both IIf(IsNull([AddedMethanol and IsEmpty(). These don’t seem to work help either. I have also tried using the Nz function when calculating [Addedmethanol] and forcing it to return “0.00” if it results in a null value. I have searched the forum and the web and have come up empty so far. At this point I am stumped why it is not working. Any help would be much appreciated. Thanks, Mike MethanolUsage for the first record should be 1085.05 FallVolume: FormatNumber(DLookUp("[Volume]","[tblTankGaugeCharts]","[DipDepth]=" & [FallDipReading] & "And [TankID]=" & [MethanolTankID]),2,0) SpringVolume: FormatNumber(DLookUp("[Volume]","[tblTankGaugeCharts]","[DipDepth]=" & [SpringDipReading] & "And [TankID]=" & [MethanolTankID]),2,0) Attached Images qryAnalysis.JPG (27.7 KB, 260 views) miaki16 View Public Profile Find More Posts by miaki16 04-14-2010, 06:04 AM #2 DCrake Administrator Join Date: Jun 2005 Location: Burnley, Lancashire Posts: 8,634 Thanks: 8 Thanked 297 Times in 205 Posts Re: Calculated field returning #Error This is because you have a null value in one of your calculated fields. You will need to wrap Nz() around each
Ask a Question Need help? Post your question and get tips & solutions from a community of 418,438 IT https://bytes.com/topic/access/answers/911383-getting-rid-error-returned-if-field-null Pros & Developers. It's quick & easy. Getting Rid of an #ERROR http://access.mvps.org/access/forms/frm0022.htm returned if Field is null P: 10 Calvin Dent Hi Guys, I have a probably relatively simple problem to fix but cannot seem to work it out. The Function I have is Expand|Select|Wrap|Line Numbers IfDateField=Date-1Then ValueField="1" Endif The function works perfectly, The problem is. If DateField is Null #error in then the information returned in ValueField is #ERROR.. I'd like it to just return Null if theres nothing in it. I've experimented with: Expand|Select|Wrap|Line Numbers IfDatefield=NullThen Valuefield="" Else IfDatefield=Date-1Then ValueField="1" Endif Endif But it still returns the #Error. :( Apr 6 '11 #1 Post Reply Share this Question 7 Replies Expert Mod 100+ P: 2,314 TheSmileyCoder You can use Expand|Select|Wrap|Line #error in access Numbers IsNull(Variable) to check for null. You can't compare (= is a comparison operator) to null, since null is not a value, its is the absence of a value, the absence of information. Apr 6 '11 #2 reply Expert 100+ P: 1,204 jimatqsi Try if Isnull(Datefield) then Valuefield = "" ... Jim Apr 6 '11 #3 reply Expert Mod 2.5K+ P: 2,543 Stewart Ross Try Expand|Select|Wrap|Line Numbers IFIsNull(DateField)THEN ValueField="" ELSE IFDateField=Date-1Then ValueField="1" Endif EndIf -Stewart Aah, Jim got in first with the same suggestion! Apr 6 '11 #4 reply P: 10 Calvin Dent Hey Again Guys, This is the exact Code piece I'm using: Expand|Select|Wrap|Line Numbers PublicFunctionJobAttYest(ComfieldAsString)AsString IfIsNull(Comfield)Then JobAttYest="" Else IfComfield=Date-1Then JobAttYest="1" EndIf EndIf EndFunction Added the IsNull but I'm still suffering the same Error issue... Can't seem to work it out :S Apr 6 '11 #5 reply 100+ P: 332 Mariostg You declared Comfield as String. A String cannot be null. I don't think it is a good habit to have a field value null. You should set it a default value. Apr 6 '11 #6 re
of Use Forms: #Error when the Subform has no records Author(s) Keri Hardwick Here are some facts about #ERROR returned when a subform has no records:In these examples, [Subf field] refers to a syntactically correctreference to a subform field from a main form. 1. It will not evaluate to null: IsNull([Subf field]) is false 2. It will evaluate to an error on the main form, but not when passeto a global module: IsError([Subf field]) on the main form evaluates to true IsAnError([Subf field]) returns false, where this function exists in a global module: Function IsAnError(testvalue as variant) as Boolean IsAnError = IsError(testvalue) End Function 3. It will not evaluate to numeric. IsNumeric([subf field]) evaluates to false. I have found this to be the best test, since often it is a total or other number being passed back to the main form. If not, there is usually some numeric field on the sub that can be tested whether or not it is the field used on the main form. This test indicates when there are records, IsNumeric will be true; when there are no records, IsNumeric will be false. So, you can catch "no records" and display what you want instead of #ERROR. This function returns zero instead of #ERROR when used like this:nnz([Subf field]) on the main form. I use it from a global module. '***************** Code Start *************** 'This code was originally written by Keri Hardwick. 'It is not to be altered or distributed, 'except as part of an application. 'You are free to use it in any application, 'provided the copyright notice is left unchanged. ' 'Code Courtesy of 'Keri Hardwick ' Function nnz(testvalue As Variant) As Variant 'Not Numeric return zero If Not (IsNumeric(testvalue)) Then nnz = 0 Else nnz = testvalue End If End Function '***************** Code End **************** © 1998-2010, Dev Ashish & Arvin Meyer, All rights reserved. Optimized for Microsoft Internet Explorer