xlsread - Undefined function 'dec2base27

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Andre Labuschagne
Andre Labuschagne on 12 Oct 2016
Commented: Walter Roberson on 2 Feb 2017
Hi I am running R2013a on Windows 7 Prof. I have been successfully using xlsread in a script to read .xlsx spreadsheets (Excel 2010) - worked 100%. Last night I accidentally opened another instance of Matlab, my pc slowed down dramatically, but the script was still executing. I then closed both instances of Matlab and opened only one instance. Since then I have been getting this error: Undefined function 'dec2base27' for input arguments of type 'double'. Searches via Google show quite a few similar problems. I have tried the following (without success): (I used the function as follows: [~,~,RAW]=xlsread(FILE,SHEET,RANGE)) a] Have relevant spreadsheet open/closed will running the script. b] Removing the 'Range' argument. c] Added the 'basic' argument. d] Changing spreadsheet to Excel 97 format. e] Disabling Excel add-ins: - Send to Bluetooth" (btsendto_office.dll) - I do not have this add-in: ADTAPLib.ApproveItAddin
Please advise Thanks Andre
Jan on 13 Nov 2016
@MEBARA TANGA Serge: Please post the message as text, not as screen shot. It is much easier to ask an internet search engine for details, when I can use copy&paste, instead of typing the text by my own.

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Answers (3)

Walter Roberson
Walter Roberson on 13 Nov 2016
In R2013b, dec2base27 was a function inside of xlswrite.m and xlsread.m did not use dec2base27 at all.
You should be checking for the possibility that you are using an old version of xlsread.m . In R2013b, line 105 of xlsread.m should say
% $Revision: $ $Date: 2012/12/10 23:52:43 $

Pritesh Shah
Pritesh Shah on 12 Oct 2016
Dear Andre,
Restart the laptop. It may work.. :))
  1 Comment
MEBARA TANGA Serge on 13 Nov 2016
Hi, I have the same problem. I have already restart the laptop but it doesnt work.
Can you help me?

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Jen on 31 Jan 2017
Hi, I have the same problem. The error message is:
Error using xlsread (line 248)
Undefined function 'dec2base27' for input arguments of type 'double'.
Line 105 of xlsread.m says exactly:
% $Revision: $ $Date: 2012/12/10 23:52:43 $
Thank you for your answer!
Walter Roberson
Walter Roberson on 2 Feb 2017
A 2015 copyright certainly should not have been present in R2013b. You might need to reinstall MATLAB to get the correct version.
Had you installed a Mathworks patch at some point?

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