X Control Exec State Change with Panel Close

I have an X Control that launches VIs dynamically and loads them into subpanels. If I put this X Control on a VI front panel and that VI has its panel closed, but that panel close event is unhandled so LabVIEW takes the default panel close behavior, the exec state change never fires. If I reopen the VI however, it is stopped. Because of this, my shutdown user event which is sent in the Exec State Change event case never sends and my VI is left running in the background.
Of course, I know the panel event should be handled, but this is about robustness of my X Control, not the panel close event handling. Is there any way I can capture this specific case?
CLA, LabVIEW Versions 2010-2013

DevonR wrote:
Hi,
Thanks for sending in the code. Have you tried implementing an event structure? With an event structure, you can set the event to, “Application Instance Close”, so that you can execute some code when a user executes the Quit LabVIEW function. Please see attached screenshots.
Devon R.
Applications Engineer
National Instruments
This doesn't work because if you close an owning project but not LabVIEW, the refnum goes invalid. However, I got an answer from here that lets me know what I needed to.
CLA, LabVIEW Versions 2010-2013

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Using Control Reference to change subVI control - sub VI also called using a container

Hello
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Check Time.lvproj ‏6 KB

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Need help created state machine with timed digital output

Hello everyone I'm new in LabView especially about how to make a state machine. I want to make simulation about state machine with digital output. In Front Panel there are volt_in as an input slider (0-10 V), two numeric control (upper limit and bottom limit), a waveform chart to plot those 3 value, and three boolean (P0.0, P0.1, P0.2) as an indicator. Boolean indicator will on if input from slider exceed the limit in certain situation. This simulation will work as follow:
1. Define the upper & bottom limit (ex. 8 & 4V)
2. Make an input from slider (0-10V)
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5. Wait 15 second, then repeat process from (2)
Same process for input that exceed the bottom limit (P0.1 and P0.2 as indicator).
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Attachments:
State Machine Digital Output.vi ‏28 KB

I would highly recommend you to open the template in LabVIEW to design state machines. You can the Standard State Machine template if you go to File -> New.. and Browse to VI -> From Template -> Frameworks -> Design Patterns.
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Doubt in control break statement

Hi All,
Is there any way to trigger control break statements at new & at end of for non primary key fields.
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regards
vishal

hi vishal,
Variants:
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2. AT END OF f.
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Effect
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Note
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Variant 1
AT NEW f.
Variant 2
AT END OF f.
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Effect
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Variant 3
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SUM.
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ENDAT.
WRITE: / WA_COMPANIES-NAME, WA_COMPANIES-PRODUCT,
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ENDLOOP.

An INSERT EXEC statement cannot be nested.Please tel me some good way of formulation in following situation.

Hi,
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GO
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yours sincerly

You can not do like above:
Try the below:(Not tested), Below, we do not change the code, however, we placed your dynamic execution to different procedure.
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@para1 int
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@para1 int
@para2 datetime
AS
BEGIN
CREATE TABLE #tem
exec [dbo].[Procedure3] @para1
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CREATE PROCEDURE [dbo].[Procedure1]
@para1 int,
@para2 datetime
AS
BEGIN
delete from table1 where id=@para1
insert into table1 ( col1,col2)
exec ('select * from abc
left join #tem on id=temid
where id =' + cast(@para1 as varchar) -- i do not want to change this big dynamic query, because it has many optonal code concatinated by using "if then else".
……. There are many blocks in this SP where we are deleting and inserting
with different SP .
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Expert: Geometry
Marketing Manager: Just ignore it.

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Hi friends,
       pls explain , what is the use of control break statements( at first, at last, at new, at end of, on change of ) ? and practical difference applying at new and on change.
Pls send me material or links related to control break statements.
Thanks in advance.
SR K

Hello SR K,
Just go through the following documentation.
AT - Control breaks with extracts
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              2. AT END OF f.
              3. AT FIRST.
              4. AT LAST.
              5. AT fg.
Effect        In a LOOP which processes a dataset created with EXTRACT, you
              can use special control structures for control break
              processing. All these structures begin with AT and end with
              ENDAT. The sequence of statements which lies between is
              executed whenever a control break occurs.
              You can use these key words for control break processing with
              extract datasets only if the active LOOP statement is
              processing an extract dataset.
              The control level structure with extract datasets is dynamic.
              It corresponds exactly to the sort key of the extract dataset,
              i.e. to the order of fields in the field group HEADER by which
              the extract dataset was sorted.
              At the end of a control group (AT END OF, AT LAST), there are
              two types of control level information between AT and ENDAT:
              - If the sort key of the extract dataset contains a
                 non-numeric field h (particularly in the field group
                 HEADER), the field CNT(h) contains the number of control
                 breaks in the (subordinate) control level h.
              - For extracted number fields g (see also ABAP Number Types),
                 the fields SUM(g) contain the relevant control totals.
Notes         1. The fields CNT(h) and SUM(g) can only be addressed after
                 they have been sorted. Otherwise, a runtime error may
                 occur.
              2. The fields CNT(h) and SUM(g) are filled with the relevant
                 values for a control level at the end of each control group
                 (AT END OF, AT LAST), not at the beginning (AT FIRST, AT
                 NEW).
              3. When calculating totals with SUM(g), the system
                 automatically chooses the maximum field sizes so that an
                 overflow occurs only if the absolute value area limits are
                 exceeded.
              4. You can also use special control break control structures
                 with LOOPs on internal tables.
Variant 1     AT NEW f.
Variant 2     AT END OF f.
Effect        f is a field from the field group HEADER. The enclosed
              sequence of statements is executed if
              - the field f occurs in the sort key of the extract dataset
                 (and thus also in the field group HEADER) and
              - the field f or a superior sort criterion has a different
                 value in the current LOOP line than in the preceding (AT
                 NEW) or subsequent (AT END OF) record of the extract
                 dataset.
              If f is not an assigned field symbol, the control break
              criterion is ignored, and the subsequent sequence of
              statements is not executed. If a field symbol is assigned, but
              does not point to the HEADER field group, the system triggers
              a runtime error.
Example
              DATA: NAME(30),
                    SALES TYPE I.
              FIELD-GROUPS: HEADER, INFOS.
              INSERT: NAME INTO HEADER,
                      SALES INTO INFOS.
              LOOP.
                AT NEW NAME.
                  NEW-PAGE.
                ENDAT.
                AT END OF NAME.
                  WRITE: / NAME, SUM(SALES).
                ENDAT.
              ENDLOOP.
Notes         1. If the extract dataset is not sorted before processing with
                 LOOP, no control level structure is defined and the
                 statements following AT NEW or AT END OF are not executed.
              2. Fields which stand at hex zero are ignored by the control
                 break check with AT NEW or AT END OF. This corresponds to
                 the behavior of the SORT statement, which always places
                 unoccupied fields (i.e. fields which stand at hex zero)
                 before all occupied fields when sorting extract datasets,
                 regardless of whether the sort sequence is in ascending or
                 descending order.
Variant 3     AT FIRST.
Variant 4     AT LAST.
Effect        Executes the relevant series of statements just once - either
              on the first loop pass (with AT FIRST) or on the last loop
               pass (with AT LAST).
Variant 5     AT fg.
               Addition:
               ... WITH fg1
Effect        This statement makes single record processing dependent on the
               type of extracted record.
               The sequence of statements following AT fg are executed
               whenever the current LOOP record is created with EXTRACT fg
               (in other words: when the current record is a fg record).
Addition      ... WITH fg1
Effect        Executes the sequence of statements belonging to AT fg WITH
               fg1 only if the record of the field group fg in the dataset is
               immediately followed by a record of the field group fg1.
Reward If Helpful
Regards
Sasidhar Reddy Matli.

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