Friday, March 4, 2016

VLOOKUP returning #N/A when it shouldn't

I am using VLOOKUP to convert rounded decimals to mixed fractions up to 1/32nds (e.g.
1.313 => 1-5/16).  I have quite a few decimals and a bunch of them are working correctly, but some of them are returning #N/A when they shouldn't.
This is my formula:
=IF(INT(EM37)>0,INT(EM37),"") & IF(EM37-INT(EM37)>0, IF(INT(EM37)>0,"-","") & VLOOKUP(EM37-INT(EM37),Lookup!$B$145:$C$175,2,FALSE),"")
After doing a bit of research on VLOOKUP problems, the pattern seems to be conflicting data types between lookup_value and the first column of table_array.  I have verified that ISNUMBER returns TRUE for both.
Opening "Show Calculation Steps" from the error menu that appears next to the #N/A cell for EM37=1.313, the following is shown:
"1" & IF(TRUE, "-" & VLOOKUP(0.313,Lookup!$B$145:$C$175,2,FALSE), "")
The next evaluation will result in an error.
Here is B154:C154, which is within table_array:
0.313    5/16
Why is #N/A being returned???

Anwsers to the Problem VLOOKUP returning #N/A when it shouldn't

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bwaldmann wrote:
I am using VLOOKUP to convert rounded decimals to mixed fractions up to 1/32nds (e.g.
1.313 => 1-5/16).
This is my formula:
[....] VLOOKUP(EM37-INT(EM37),Lookup!$B$145:$C$175,2,FALSE) [....]
Here is B154:C154, which is within table_array:
0.313    5/16
Why is #N/A being returned?
Perhaps because the value EM37-INT(EM37) does not __exactly__ match the binary representation of the constant 0.313, and you are doing an an "exact" VLOOKUP (FALSE).
To confirm, try entering the following formula  exactly  as written (with "redundant" +0"):
Format as Scientific.  Is the result 0.00E+00 (exactly zero) or something else?
If you continue to use this design, you should sort B145:C175 in ascending order based on column B, and use "approximate" VLOOKUP with TRUE in the last parameter.  It is more efficient, too.
But even then, you might get bitten because EM37-INT(EM37) might  appear 
to be 0.313, but it is actually infinitesimally less than the binary representation of the constant 0.313.
To avoid that, use ROUND(EM37-INT(EM37),3) if the constants in B145:B175 are always rounded to 3 decimal places.
If not, round to the greatest precision represented by the constants in B145:B175.

Because of this VLOOKUP returning #N/A when it shouldn't error, Windows can fail in starting some processes and the system's performance can significantly slow down. In some cases, Windows has problems starting up and the system can freeze.

Lastly, this error VLOOKUP returning #N/A when it shouldn't can even result in the Blue screen of death error message, just like other critical Windows errors. If any of the above problems and symptoms occur in your PC, then you should immediately seek to resolve this problem.

In order to resolve VLOOKUP returning #N/A when it shouldn't error or repair the corrupted and damaged Windows files, you will need a VLOOKUP returning #N/A when it shouldn't error repair tool. There is more than one method of treating this kind of error code, and here is how you can manually do it:

  1. Start the computer and log in as administrator
  2. Go to the start button and select All Programs. Go to Accessories, System Tools, and then System Restore
  3. Click on System Restore and in a new window, select the 'Restore my computer to an earlier time's option and click Next
  4. On the new confirmation window that appears, click Next
  5. Restart your computer after the restoration has been completed

Another Safe way to Repair the Problem: VLOOKUP returning #N/A when it shouldn't:



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