Problem in background task with Control channel trigger in Windows 8.1 app

Hi,
I created app with control channel trigger as background task.
This is working fine in windows 8.1 desktop whenever app in background and switching from my app to other apps.
But this same behavior is not working fine in windows tab, whenever app switching the notification associated with background task is not working. And some times it throws delayed notifications.
As assumption based, is there any problem in tab to initiate the background task in suspended mode? or is there any regulations for control channel trigger using?
Expecting your feedback!!! thanks

Hello Kabir,
Since this issue is related windows store apps, I move it to the
store app forum for getting better help.
Rgeards.
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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Source code for analogical acquisitino task :
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The question is : is there a way to to that without having that kind of message?
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Thanks a lot.
Pièces jointes :
MsgErreur NIDAQmx.JPG ‏38 KB

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CALL FUNCTION
Variant 5
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1. ... AS SEPARATE UNIT
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Since each destination defines its own program context, further calls to the same or different function modules with the same destination can access the local memory (global data) of these function modules.
Note
Note that a database commit occurs at each Remote Function Call (RFC). Consequently, you may not use Remote Function Calls between pairs of statements that open and close a database cursor (such as SELECT ... ENDSELECT).
Addition 3
... EXPORTING p1 = f1 ... pn = fn
Effect
EXPORTING passes values of fields and field strings from the calling program to the function module. In the function module, formal parameters are defined as import parameters. Default values must be assigned to all import parameters of the function module in the interface definition.
Addition 4
... TABLES p1 = itab1 ... pn = itabn
Effect
TABLES passes references to internal tables. All table parameters of the function module must contain values.
Notes
If several function module calls with the same destination are specified before COMMIT WORK, these normally form an LUW in the target system. Calls with the addition 1 are an exception to this rule - they each have their own LUW.
You cannot specify type 2 destinations (R/3 - R/2 connections).
(See Technical details and Administration transaction.)
Example
REPORT RS41503F.
/* This program performs a transactional RFC.
TABLES: SCUSTOM.
SELECT-OPTIONS: CUSTID FOR SCUSTOM-ID DEFAULT 1 TO 2.
PARAMETERS: DEST LIKE RFCDES-RFCDEST DEFAULT 'NONE',
            MODE DEFAULT 'N',
            TIME LIKE SY-UZEIT DEFAULT SY-UZEIT.
DATA: CUSTITAB TYPE TABLE OF CUST415,
      TAMESS   TYPE TABLE OF T100,
      WA_CUSTITAB TYPE CUST415.
SELECT ID NAME TELEPHONE INTO CORRESPONDING FIELDS OF TABLE CUSTITAB
               FROM SCUSTOM WHERE ID IN CUSTID ORDER BY ID.
PERFORM READ_CUSTITAB.
EDITOR-CALL FOR CUSTITAB TITLE 'Editor for table CUSTITAB'.
PERFORM READ_CUSTITAB.
CALL FUNCTION 'TRAIN415_RFC_CALLTRANSACTION'
     IN BACKGROUND TASK
     DESTINATION DEST
     EXPORTING
          TAMODE    = MODE
     TABLES
          CUSTTAB   = CUSTITAB.
CALL FUNCTION 'START_OF_BACKGROUNDTASK'
     EXPORTING
          STARTDATE = SY-DATUM
          STARTTIME = TIME
     EXCEPTIONS
          OTHERS    = 1.
IF SY-SUBRC = 1.
EXIT.
ENDIF.
COMMIT WORK.
CALL TRANSACTION 'SM58'.
      FORM READ_CUSTITAB                                   *
FORM READ_CUSTITAB.
WRITE: / 'System ID:', SY-SYSID.
SKIP.
LOOP AT CUSTITAB into WA_CUSTITAB
    WRITE: / WA_CUSTITAB-ID, WA_CUSTITAB-NAME,
             WA_CUSTITAB-TELEPHONE.
ENDLOOP.
ULINE.
ENDFORM.
Pls. reward if useful....

How to run two vi's at the same time, one uses an AI task with 8 AI channels the other a single AI and AO channel???

Hello Everyone,
Here is my situation. I have one vi that is reading an AI task of 8 channels AI0 --> AI7 (one sample on demand) and also has control of all of the digital outputs on the board. My problem is that I want to run another vi that will use the last AI channel AI8 and an AO channel AO0. These two vi's do not need to know anything about one another but I do need them both to be running at the same time. Currently when I try running the two vi's together both vi's crash and I get an error message stating that the AI8 pin is reserved. AI8 is not part of the task and is not refrenced anywere in the larger vi. I am assuming that this problem is do to the fact that the larger vi is occupying the DAQ board, cycling through the task when the smaller vi is requesting data from AI8 and the DAQ board cannot do two things at once. The sampling rate on the smaller vi is not really that important. Is there anyway I can get the smaller vi to read from AI8 and not crash??? Software and Hardware listed below. Thanks in advance for any suggestions.
PCI-6221
Labview 7.1

Hi steve ,
Sorry to say that you cannot configure and acquire from AI channels on a Device simultaineously from 2 seperate VI's.
regards
Dev

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