Why do I get an error when I specify date as one of the override options in HISTORY function in Datafeed Toolbox 4.2(R2011b)?

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I am trying to use the blp/history function to define the override option 'BETA_OVERRIDE_START_DT'.
The date string that I have specified, '20120319', works with getdata.
For example,
d = getdata(c,'AC* MM Equity','BETA_ADJ_OVERRIDABLE',{'BETA_OVERRIDE_REL_INDEX','BETA_OVERRIDE_START_DT'},{'MEXBOL Index','20120319'});
However, when I use the same date string with the HISTORY function I get the error:
Cannot convert input into specified date string.
I am using the HISTORY function in the following manner:
d = history(c,'AC* MM Equity','BETA_ADJ_OVERRIDABLE',overrideOption2)
Where overrideOption2 is...
'BETA_OVERRIDE_REL_INDEX' 'MEXBOL Index'
'BETA_OVERRIDE_START_DT' '20120319'
Why do I get this particular error with HISTORY function?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 29 Mar 2013
The error is thrown in MATLAB because the date format '20120319' is not a recognized format in MATLAB.
You can use the DATENUM function to specify the format of the date via the following code:
datenum('19.03.2012','dd.mm.yyyy')
Replace '20120319' with the above command.
MATLAB will accept the first argument as a date string represented in a format specified by the second argument.

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