You Tried To Assign The Null Value To A Variable That Is Not A Variant Data Type. (Er
Jul 1, 2007
Hi,
I am getting this error 'You tried to assign the Null value to a variable that is not a Variant data type. (Error 3162)' I know why I am getting the error, I found out that Form and Subform should be implemented only with one-to-many relationships where the Subform is the many end. However, I have the opposite of that for a reason.
Is this bad practice? Is there anyway around it or to fix the error please?
This is a follow up to a problem I had with a Subreport which I have now solved but would like additional information on the differences between 97 and 2000.
basically I ghad a subreport that worked in97 but gave Invalid Argument in 2000.
It appears that the linking field was too long and this caused the Invalid Argument.
The fileds were a concatonation of two fields. One Number and One Text Field. Yes they were a bit long in certain circumstances but for fairly good reasons. I believe these would be generated as Type Variant.
Does anybody know the differences in teh Variant Type between 97 and 2000. I have tried searching teh Help in 2000 but unable to find any info or indeed the correct phrase to search on.
I have an Access 2010 database where we have a SQL Linked Table with a column that is nVARCHAR(20) Not Null data type. We have created a form for data entry. Currently when the user tries to erase a value or choose not to define a value we get the following error.
"You tried to assign the Null value to a variable that is not a Variant data type."
This field should accept a blank value "" as the user may not want to set the value. We do not have control over the DB schema, so how can I work around this issue in access?
Hy,i have this problem: I've got a table that has column called car_id which is primary key and autonumber. How can i get last record from that column and assign it to variable which i defined as integer. Is there something like: myvariable=max("car_id","mytable") ???? Thankls for any help
I have a variable (dtDueDate as Date) showing as 6/28/2013. I want to append a time value to it (dtMaxTime as Date) which is 5:00 PM so dtDueDate reads 6/28/2013 05:00:00 PM. I have been going in circles trying to figure this out. My goal is to append this date to a table field which has a datetime (General Date).
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 want to create a function module or something similar which will assign a variable to the max invoice # used on that table, using sql if possible. I tried something like this, but it's not working.
Public Function max()
Dim maxinvoice As String
maxinvoice = "SELECT Max(tbl_original.invoice) AS MaxOfinvoice" & _ "FROM tbl_original;"
MsgBox maxinvoice
End Function
I would like the msgbox to popup saying "5", since that is the max invoice # used based on the above table.
I don't have too much experience using modules on their own without forms and variables on the form to assign to, can someone make a suggestion?
I have a simple combo box with two options - elective and emergency. They are set up on a continuous form. When i try to choose a value it comes up with the message "You cannot assign a value to this object". I have checked the three criteria it mentions, object being on a form open in design view (no), value too large for field (no - text field with (defaulted) size of 50), control on a read -only form (no, form is editable). The strange thing is as soon as you clear the error message box it lets you enter the value anyway. Any ideas?
I have set a "form-wide" variable on a certain form to contain integers. I want to populate this variable from a subform located on this form.
So, for example, if the form has an integer for CompanyID, I want to populate this variable from the subform so that when I am back on the main form I can use this variable with the populated variable. What is the syntax for this?
I am using a basic Order form and Order Details subform to capture my information. Customer is selected, then Products and Quantities are filled in... the subform calculates the total price. This all works great. Then I have a problem.
I have some national customers that require shipping to multi regions. I would need to select the regions and it has to calculate a new case cost for each product for each area. Could be up to 100 (10 products x 10 areas) new calculated prices.
Then for other customers, I will use just the case cost for the whole order (multiple products) and add one shipping fee to cover the drop. 3 products and only 1 fee added to the total.
Currently, my Order Form uses a Tab page and the Order Details are on the first tab. I could put the Shipping Info on the second tab, I just don't know how to add up to 10 different shipping regions to generate 10 new prices or the one drop fee to the total price.
I have a table with a field with names set to text data type and i want to change it to number data type but when i do it in design view the data get lost. I want to know if there is a way to convert the data in the field as number type and keep the data in the field.
Question for Documentation purpose: Should the Public Type be declared in its own module?
Or should it be declared in a standard module where non-public functions use it? It is not for a Form module use.
For a Rule Engine, a function is calling one record on 4 different SQL Views (as linked tables) that have the same field format.
For speed, the recordset should only be opened once. However, there are multiple values that must be returned to the result table multiple fields.
One way to return multiple values is an Array. That has over head too.
Another way is to create multiple public variables. Not my choice for documentation. Another is to create a string.
This is a pure code module with several non public functions / subs. What is the documentation preference? List a Public Type close to the function, or place it in the Global module?
Background: A function can only have one return value.
By creating a public Type, multiple values can be returned.
Code: Public Type Income Wages As Currency Dividends As Currency Other As Currency Total As Currency End Type
Use this structure as the return type for a function. In a real situation, the function would look up your database tables to get the values, but the return values would be assigned like this:
Code: Function GetIncome() As Income GetIncome.Wages = 950 GetIncome.Dividends = 570 GetIncome.Other = 52 GetIncome.Total = GetIncome.Wages + GetIncome.Dividends + GetIncome.Other End Function
To use the function, you could type into the Immediate Window:
GetIncome().Wages
(Note: the use of "Public" in the Type declaration gives it sufficient scope.)
Important Notice The way this function is called will work, but is wrong from the aspect it re-calls the recordset over and over.
I'm new to programming with Access but am attempting to create a new field in a table with an new date based on existing fields in the table.
The current fields are [Frequency], integer, [Risk], text, [Last Audit Date], date/time, and the new field is [Next Audit Date]. [Frequency] is a calculated field based only on [Risk] and is equal to "5" if [Risk] is "Low" and is "3" is [Risk] is "Medium" or "High", and [Frequency] is blank if [Risk] is (thus far it has never been empty).
What I need the new calculated field to do is return "N/A" (or blank, or anything easily separated really) if [Frequency] is blank, or if [Risk] is "Low" or "Medium". If [Risk] is "High", [Next Audit Date] should be equal to [Last Audit Date] plus 3 years. When I try to save the code, I get this message: "The expression could not be saved because its result type, such as binary or NULL, is not supported by the server."
This is my code now: IIf(IsNull([Frequency]),"",IIf([Risk]="Low","N/A",IIf([Risk]="Medium","N/A",IIf([Last Audit Date]="N/A","N/A",[Last Audit Date]+Year(3)))))
Hi guys, this worked under access 2000, but not anymore under 2003 "strtrans" is not getting the value. I can't find what's wrong, tried string, defininf them in a module. Nothing. Anybody any idea why that is? Here's the code:
Dim strTable As Variant Dim strField As Variant Dim strtrans As Variant Dim stDocName1 As Variant Dim stDocName As Variant stDocName1 = "qerDelActieTabel" stDocName = "qerUpdateActietabel" On Error GoTo Err_Knop20_Click Me.Probleem.SetFocus If Me.Probleem.Text = "" Then DoCmd.Close Else Me.Appcode.SetFocus If Me.Appcode.Text = "" Then strTable = "tblActie" strField = "Probleem" strtrans = Me.Ingavedatum.Value strtrans = strtrans & "ac" & DCount(strField, strTable) Me.Appcode.Text = strtrans MsgBox sttrans & strField & strTable & stDocName & stDocName1 DoCmd.DoMenuItem acFormBar, acRecordsMenu, acSaveRecord, , acMenuVer70 DoCmd.OpenQuery stDocName, acNormal, acEdit DoCmd.Close Else MsgBox sttrans & strField & strTable & stDocName & stDocName1 DoCmd.DoMenuItem acFormBar, acRecordsMenu, acSaveRecord, , acMenuVer70 DoCmd.OpenQuery stDocName1, acNormal, acEdit DoCmd.OpenQuery stDocName, acNormal, acEdit DoCmd.Close End If End If Exit_Knop20_Click: Exit Sub
Copy that recordset into a Variant variable, similar to a matrix
Run a Heuristic Algorithm on the matrix to populate values
Delete * from the orginal Access table
Input new data into the Original Access table by looping through matrix with an INSERT INTO statement.
This method works but I do not like the loop in step 5 as I am calling an INSERT INTO statement 800+ times and can be slow. Any way to view the variant as a whole and not have to loop through the entire matrix. Maybe possibly converting the variant to an Access tabledef.
Created a new Query (called qry_Temp) from and existing Query (qry_Test that has fields Field1 - Field5) using QueryDef , and inserted a new Field (FieldX) into it (see example below) using the .Parameters property, then opened a Recordset based on the new Query in order to attempt to enter data values into the new Field (FieldX) for each record in the query - but cannot assign any data values to this new Field (but can to the existing fields) in the new Query?
Dim DB As Database Dim rs As DAO.Recordset Dim qdfNew As QueryDef Dim strSQL1 As String Dim strSQL2 As String Dim Value1 As Integer
I need to be able to precisely handle nonnegative integers (in the math sense of integer, not the VBA sense, of course) between the values of 0 and 808,035,046,350,570,000. (Don't ask.)
I'm wondering whether I should be handling these numbers in a string and do everything manually, or whether the datatype Decimal or Variant will work for me.
I read that Decimal handles +-79,228,162,514,264,337,593,543,950,335 with no decimal point, or +-7.9228162514264337593543950335 with 28 places to the right of the decimal.
I absolutely cannot have the "rounding type errors" and "oddities" that you get by storing integer values in doubles, for example, due to imprecission.
Seeing that Decimal seems to work in a decimal point manner worries me, that perhaps I shouldn't be using it for this scenario. However, it's range seems so much larger than what I need, I'm wondering if I would "get away" with it.
If needing no imprecission to creep in means that I have to use Strings and implement my own String math library, that's the route I would have to go.
Question 1 - If I need the numbers to be exact (again, nonnegative integers, no decimal points), do I need to use a String, or should I use a Decimal or Variant type?
Question 2 - What is the difference between Double and Variant, for the purposes of storing numeric values? I read that Doubles are 8 bytes, and Variants are 16 bytes, however the Variant description is "Any numeric value up to the range of Double", which confuses me since it's double the size.
I have a field in a table that is comprised of mostly numerical data but some records are text.
I want to convert this field to numerical only and make a new field to put the textual data in.
However converting the field will delete the textual data. What is the easiest way to convert the field but save the textual data AND append the textual data to the SAME record that they were in originally in the new field?
I’m not an expert in Access and hope that someone can help me with my problem. I have about 20 fields of Yes/No data type.
E.g. StudentID- Tex Science – Yes/No Math – Yes/No Biology – Yes/No Chemistry – Yes/No Economics – Yes/No ...
I would like to create a parameter query (without using form combo box) where when I run the query, it would prompt me for the subject name. Let say I keyed in Science, it would list out all the StudentsID who took up Science only (with a Yes) and the other subjects.
I want to input data number such as 0.5 in my table, but it doesn't work. I already fill field size : integer with format : Standard with Decimal : 2, but the result is always 0.00 not 0.50 as my expectation. How to define that in my table?
When exporting a table to excel is there anyway to presever the data structure - ie a text field of length 30 will only take text length 30, Interger would only take integer and date would only take date etc, etc ,etc.
