Sudden error occurs on executing Matlab program

Dear all,

I wrote some Matlab programs (several M files and functions) and saved them in a folder. I successfully ran these programs after finised writting. However, after I surfed Internet for a while and got back to ran them again, there were strang errors. For example, when I ran a file called Test.m I wrote, it complains

??? Undefined function or variable 'Test'

And it happens to all other programs (within the same folder) as well. If I copy them to a different drive or different folder, the error still occurs to some of the programs.

Would you please tell me why this happened and how to solve it?

Many thanks and I look forward to your reply.

Sincerely, Jinlong.

Answer 1

[Jon]

Make sure the folder they are in is in the MATLAB search path.

File > Set Path ...

Answer 2

[David Young]

Try changing the current MATLAB directory to the folder containing your M-files, or else adding that folder to your MATLAB path, using the addpath function or the path tool.

Answer 3

[Jinlong Wei]

Dear Jon and David,

Thanks for your suggestions. However, seems the problem is more strang, as I used the addpath function and the path commend shows the directory has already been added in but the same problem still there!

Also, I have another parallel folder where the programs I wrote can run without any problem! You may suggest me to put the programs in that parallel folder. Yes I did it but the problem is the same. My computer adminstrator has installed a new version Matlab for me, however, the problem is not solved.

Really get surprised on what happened.

Thanks.

Jinlong.