Error If Null Field

May 9, 2006

I would like a MsgBox to pop up for the user if the Priority field is blank and the box count is not. I tried doing this on the report but the report will just not run. So I considered adding a module to the query.

However, I get a Data type mismatch. Below is the module and query. Can someone help me with this?

Function ErrorPriorityReport(ByVal BackPriority As Integer, ByVal BackBoxes As Integer, ByVal Priority As Integer, ByVal SumOfBoxes As Integer) As String
If BackPriority Is Null And BackBoxes <> Null Then
MsgBox "Report will be inaccurate! There are blank priorities. Please run report on Customer Menu!", vbOKOnly, "Missing Priority"
End If

If Priority Is Null And SumOfBoxes <> Null Then
MsgBox "Report will be inaccurate! There are blank priorities. Please run report on Customer Menu!", vbOKOnly, "Missing Priority"
End If
End Function


Here is the field in the query calling the module:
ErrorCheck: ErrorPriorityReport([BackPriority],[BackBoxes],[Priority],[SumofBoxes])

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Jun 29, 2012

The below formula is counting the records that have null fields in the InspDate. What is wrong in the syntax?

=[YrInpDueG0]-Sum(IIf([FSL]=0,IIf(Not IsNull([Insp_Date]),1,0)))

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Sep 23, 2014

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)))))

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Field Criteria: Is Null; There Are Null Values In That Field; No Records Are Returned

Nov 16, 2007

I think the title pretty much sums it up....

I have a query where data is first sorted by user input; first field's criteria: [fieldname], then by another field's criteria: Is Null.

I know there are records containing null values in the second field, as I have run a select query with the criteria: Like "*", to make sure they are null, and not zero-length-strings.

The query is refusing to return any results...

Any ideas?

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Bizarre Null Error?

May 25, 2005

Greetings all,

I'll try to make this as simple as possible, but please ask for clarification if I'm unclear:

*I have one pass-through query to Informix that pulls all available class schedule information.
*I have another local query that uses information in a local table to restrict that query to a particular year and semester, chosen by the user.
*I have a function TimeConv that takes the numeric value used in the Informix db to store times (e.g., "1300") and converts it into a real time value (e.g., "1:00:00 PM").

The problem is this:
While the TimeConv function by itself always works in the local query, if I try to perform any comparisons on it, I get the error message "Invalid Use of Null". There are no null records in the restricted data. If I put the semester and year restriction directly into the pass-through query instead of the local query, the comparison operations work just fine. (But it's important that the user be able to change this without editing the SQL directly.) Only when that restriction is in the local query do I get the error message.

I've tried several ways of filtering out Null values from both queries, and it doesn't seem to make any difference. If I Nz() the fields before passing them to the TimeConv function, I instead get the error "Invalid procedure or argument call", I believe because it insists on reading "0000" as "0", which is too few digits for the function to work.

I get the same results if I try to run it through yet a third (local) query.

Relevant code and SQL below. I'm really stumped on this one. Thanks in advance for any suggestions!

Pass-through query (qryPassJoin1):
SELECT t3.days, t3.room, t2.crs_no, t3.bldg, t3.mtg_no, t1.sec_no, t3.beg_date,
t3.end_date, t3.beg_tm, t3.end_tm, t9.sex, t5.abbr_name, t1.yr, t1.sess

FROM informix.sec_rec t1, informix.crs_rec t2, informix.acad_cal_rec t7,
outer (informix.secmtg_rec t8, outer informix.mtg_rec t3), outer
informix.dept_table t6, outer informix.schd_comment_rec t4, outer
(informix.fac_rec t5, outer informix.profile_rec t9)

WHERE t1.cat="UG93" and t1.crs_no=t2.crs_no and t1.cat=t2.cat and
t1.crs_no=t8.crs_no and t1.cat=t8.cat and t1.yr=t8.yr and t1.sess=t8.sess and
t1.sec_no=t8.sec_no and t8.mtg_no=t3.mtg_no and t1.crs_no=t4.crs_no and t1.cat=t4.cat
and t1.yr=t4.yr and t1.sess=t4.sess and t1.sec_no=t4.sec_no and t1.fac_id=t5.id
and t2.crs_no NOT IN
("JFESSA", "FRESSA", "SOESSA", "JRESSA", "MAESSA", "MAORAL", "DEPO", "DEPO2", "SRESSA", "SRORAL")
and t2.dept=t6.dept and t7.prog=t2.prog and t7.sess=t1.sess and t7.yr=t1.yr
and t5.id=t9.id;
If I add this criteria, functionally equivalent to the first WHERE statement in the local query below, it all works fine:
AND t1.yr=2005 AND t1.sess="SU"

Local Query (qryCatalog):
SELECT qpj1.days, qpj1.room, qpj1.crs_no, qpj1.bldg, qpj1.mtg_no, qpj1.sec_no,
qpj1.beg_date, qpj1.end_date, qpj1.beg_tm, qpj1.end_tm, qpj1.sex,
qpj1.abbr_name, DateDiff('h',TimeConv([beg_tm]),TimeConv([end_tm])) AS NoLongLab

FROM qryPassJoin1 AS qpj1, tblSettings

WHERE (((qpj1.beg_tm)>0) AND ((CInt([yr]))=CInt([tblSettings].[catyear])) AND
((qpj1.sess)=[tblsettings].[catsess]));

The comparison criterion I would like to add here is:
AND ((DateDiff('h',TimeConv([beg_tm]),TimeConv([end_tm])))<=2)

Function TimeConv:
Public Function timeconv(numtime As Variant) As Date
timeconv = CDate(Left([numtime], (Len([numtime]) - 2)) & ":" & Right([numtime], 2))
End Function

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Nov 30, 2006

Hi,

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Is it possible for me to try sth such as:

if strSQL = SELECT .. FROM .. WHERE .. = NULL then
response redirect ...

Was wondering if anybody would be able to give me some advise.

Thank you.

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Jun 24, 2005

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,FeederNeeds Summary_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.

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Dec 12, 2007

The following query runs without issues.

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#));

An 'Invalid use of Null' message is displayed.

What am I missing, here?:confused:

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Jul 21, 2006

Hey guys,

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Jul 15, 2013

How to resolve error 94 in the following code:

Private Sub Form_Current()
Dim strTime As String
Dim strHour As String
Dim strMinute As String
If (CollectionTime.Value) = "" Then
MsgBox CollectionTime

[Code] .....

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Apr 22, 2012

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I've checked the data types and relationships and they seem to be fine.

Here are links to my Access files (2007 & 2003)for your reference:

[URL]

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Dim SQL As String
Dim SpecID As Long
Dim VerifySpec As Variant
' Check for empty strings
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End If

[code]....

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Oct 9, 2013

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()

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Aug 17, 2005

Hi all. I want to check for not null value constraint for all tables in database . I tried the following but when i run it i get the following error:

Compile error:
Invalid Next control variable reference

I be happy if some one one help me fix this error.if i remove the bold lines the program workes well but it does not put not null for table fileds that requries value.

picture of the output without the bold part

http://i5.photobucket.com/albums/y1...007/notnull.jpg


Code:Option Compare Database''This module displays field name and type in a massage boxFunction ShowFields(pTable As String) As StringDim db As DatabaseDim rs As RecordsetDim I As Integer''Dim j As IntegerDim n As Integer''Dim NL As StringDim strHold As String, ST As String''Dim x As Variant''NL = Chr(13) & Chr(10) ' Define newline.Set db = CurrentDbSet rs = db.OpenRecordset(pTable)n = rs.Fields.CountReDim x(n - 1, 1) As String'''ST = "Create Table " & pTable & vbCrLf''adding Create table and table name to statementST = "Create Table " & pTable & vbCrLf & "("For I = 0 To (n - 1)For Each fld In tbl.Fields ST = ST & rs.Fields(I).Name & " " & FieldType(rs.Fields(I).Type) & "," & vbCrLf If fld.Required = True Then ST = ST & " NOT NULL" & " " Else ST = ST End IfNext Irs.Closedb.CloseSet db = NothingShowFields = ST '' returns the fields name to main functionEnd Function

on click even code

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On a different form, I have managed this by giving the form the caption "Caption" and then running the following code on load:

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Code:
'--------------------------------------------------------
' Goes to next record
'---------------------------------------------------------
Private Sub cmdNext_Click()
On Error GoTo err_handler
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Code:
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