Bug when searching array of refnum

This one just bit me so I thought I should share. It looks like the Search 1D Array function behaves unexpectedly when used with an array of VI refnums. So far I have only reproduced it in LabVIEW 2009 SP1, but I ran some code in 8.6.1 that seemed to have the same symptoms.
When I run the code above, I always get a zero for the output "index of element". In the example shown I expect to get 3. In fact if you change that 3 on the array index to any number, you get zero on the output. My workaround is to typecast the refnum array to an array of I32 and also typecast the refnum that I'm searching for. That makes it work, but I'm still freaked out by the odd behavior.
Note that the VI you throw the snippet into must be reentrant. I believe the search is getting confused because the refnums all point to the same VI, albeit different instances of that VI. Of course, that is the whole point of using the search 1D array function. I am trying to identify a particular instance.

Photon Dan wrote:
This one just bit me so I thought I should share. It looks like the Search 1D Array function behaves unexpectedly when used with an array of VI refnums. So far I have only reproduced it in LabVIEW 2009 SP1, but I ran some code in 8.6.1 that seemed to have the same symptoms.
When I run the code above, I always get a zero for the output "index of element".
I believe the search is getting confused because the refnums all point to the same VI, albeit different instances of that VI. Of course, that is the whole point of using the search 1D array function. I am trying to identify a particular instance.
Somewhat poor assumption.
"Different instances of the same vi" It Would be more correct to say the referances are all the same as they point to the same constant. Therefore since A [] are all the same you are returning the first match index 0.
Probe the array to confirm.
Turn on "Show constant folding" to see that the Loop doesn't really run
Jeff

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4: 1 -1:
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#include <windows.h>
#include <sql.h>
#include <sqlext.h>
#include <stdio.h>
#define DB_NAME ""
#define USER_NAME ""
#define PASSWORD ""
#define TEST_RETVAL(R) if (R != SQL_SUCCESS && R !=
SQL_SUCCESS_WITH_INFO) return 1;
int main()
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     SQLHENV henv;
     retval = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE,
&henv);
     TEST_RETVAL(retval);
     retval = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION,
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     TEST_RETVAL(retval);
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rgnData2[NumRows];
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rgnData1Ind);
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We get this problem too. We do a large fetch (200K rows)and find
that not only do the null indicators report incorrectly, but the
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Hallo
I have to compare a input data and the ideal data. so far i have understood how to do comparision but the problem create when ideal array have same element with different respective value , similarly input dat are appears to be also same but while doing search in final output array in 3 column looks different than as it should be.
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kalu
Solved!
Go to Solution.
Attachments:
array%20(modified)[1].vi ‏17 KB

Hi Kalu,
Check the attached VI. Let me know if it helps.
Regards,
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(Give Kudos to Good Answers, Mark it as a Solution if your Problem is Solved)
Attachments:
array (modified)[1].vi ‏17 KB

Problem searching array

I have an array in a column that I extracted from a data file. I want
to search the array for particular values and return the index which
is easily implemented by the search 1d array subvi. However, when I
input the values to search, it returns a -1 for some values and others
it finds fine where I know all the values exist. To be more precise,
my array is about 80 values between -2 and 2 in steps of 0.05. When I
search for -2, -1.5, -1, etc., I get the correct index. When I search
for other numbers like -1.8, -1.7, -1.85, etc., I get a return value
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[email protected] (H) wrote in message news:<[email protected]>...
> I have an array in a column that I extracted from a data file. I want
> to search the array for particular values and return the index which
> is easily implemented by the search 1d array subvi. However, when I
> input the values to search, it returns a -1 for some values and others
> it finds fine where I know all the values exist. To be more precise,
> my array is about 80 values between -2 and 2 in steps of 0.05. When I
> search for -2, -1.5, -1, etc., I get the correct index. When I
search
> for other numbers like -1.8, -1.7, -1.85, etc., I get a return value
> of -1. It is really strange and I am not sure of the problem. Anyone
> have any ideas? Does it have anything to do with the precision or how
> I read the spreadsheet file to extract the column?
>
> Thanks
> Heather

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Bug when searching array of refnum

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