Can't find file

[kenz...@gmail.com]

I am trying to run ampl on my mac and I keep getting a can't find file error when trying to open my .mod and .dat files. 

I have saved my .mod and .dat files directly into the ampl64 folder I have where all the unzipped files of ampl are located inside a file saved to my desktop.

this is what my terminal is showing:

Last login: Mon Aug 29 09:01:34 on ttys000

Mackenzies-MacBook-Pro-2:~ kenzievia$ /Users/kenzievia/Desktop/IEE\ 574\ AMPL/ampl64/ampl; exit;

ampl: model steel.mod;

Can't find file "steel.mod"

context: model >>> steel.mod <<< ;

ampl: 

[Robert Fourer]

It appears that you are running the command-line version of AMPL by double-clicking the "ampl" icon in the ampl64 folder.  When command-line AMPL is started in this way, MacOSX does not set the current directory (folder) to ampl64 as you would expect, and as a result the model (and data) files are not found.  You can fix this with the following AMPL command (only needed once at the beginning of each session):

   cd "/Users/kenzievia/Desktop/IEE 574 AMPL/ampl64";

Alternatively, open a Terminal application, and in the window that appears, enter the above command (without the ;) and then type ampl to start the command-line AMPL session.  (This is not a concern when double-clicking to start the AMPL IDE.)

Bob Fourer
am...@googlegroups.com

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[dlgco...@gmail.com]

Hello,

I had this same problem and it took me a lot of time to figure it out. You need to tell AMPL where to search for the file. 

So, writing; cd /Users/"Your user"/Desktop/"The name of the folder"/models";

This worked for me, also remember to save your file in the folder "models" inside of the AMPL folder.

Good Luck!