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Debugger not stopping on marker

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Bob Thompson
Bob Thompson on 16 Mar 2021
Commented: Jan on 18 Mar 2021
I have a short code that I have put a debug marker in, before running it, but when it gets run the code moves past the marker and stops on an error. There isn't any logic that should cause it to skip over (I can move the marker seemingly anywhere in the code before the error and it still gets skipped.)
Anybody have any suggestions?
The code looks something like the following:
for ii=200:200:30000
command=['!systemcommand outfile.dat.' num2str(ii) ' 9.0932 0.0000 1.8288 > File.out'];
eval(command);
fid=fopen('File.out');
for jj=1:200
linep=fgetl(fid); % Crashes here.
if length(linep) >=2
if strcmp(linep(1:5),'T ')
T=[T;str2double(linep(6:end))];
elseif strcmp(linep(1:6),'taubeg')
t=[t;str2double(linep(10:end))];
end
end
end
fclose(fid);
end
  6 Comments
Jan
Jan on 18 Mar 2021
@Bob Thompson: Avoiding EVAL is a good programming practize, not only in MATLAB, but as well in other interpreted langauges. MATLAB's code analysis cannot estimate the side effects of an EVAL command and therefore this command can have side-effects on the JIT acceleration although no variables have been defined dynamically.

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Answers (1)

Image Analyst
Image Analyst on 17 Mar 2021
Are you sure the file is saved before you try to set the breakpoint? I notice that if you stop at a break point, edit the code, and then try to set another breakpoint, it won't let you. And you can't save it while it's running or stopped at a breakpoint. You have to stop running completely, then save it, then set your breakpoint.
  3 Comments
Bob Thompson
Bob Thompson on 17 Mar 2021
Thanks, I'll look into that.

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