Error "std::exception" with function textscan in Matlab 2013b

Hi everybody, i have a file Text.txt with following sepecified content:

!typ truck,bus,car,motor,bicycle
!end typ

!allowed car,motor,bicycle
!end allowed

I want to get the string "car,motor,bicycle" from the row "!allowed car,motor,bicycle". So I did these in MATLAB 2012b:

io_contents = fullfile( 'Text.txt'); % open Textfile
Text = fileread( io_contents ); % read the content of io_contents
Rowbegin = strfind(Text,'!allowed'); find the beginn of the row  in  Text
Rowend = strfind(Text,'!end allowed')-3 ;  find the end of the row in Text
Row = Text(Rowbegin:Rowend) 
String = textscan(Row,'!allowed%s ');   
String = String{1}{1}

it should work in Matlab 2012b,but in matlab 2013b it shows this message:

Caught "std::exception" Exception message is: invalid string position

at line 6 , where textscan used is.

Could you tell me the reason, and how could I solve it. Is the an alternativ functioini for the function textscan ? Thanks a lot

Answer 1

[Walter Roberson]

It would make more sense to use regexp() for that purpose.

String = regexp(Row, '(?:^!allowed\s+)\S+', 'match');