C/NT Problems - Running

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"Substitution cannot be performed..."

PFE produces the error "Substitution cannot be performed in the specified command line as either no file is currently open, or the current window does not contain a named file"

This can be caused by the same two problems as those that cause the same error during Compiling

You have the wrong window in focus.

(eg. you have a compiler output window selected). You need to select the window with the c-code in it. This is most likely as you will probably have just tried to compile your code.

Your c-code has no filename.

(ie. you have not saved it yet) You should save your c-code first. This will give it a filename to substitute for the %f and %n in the command line. The filename must end in .C This is less likely as you would not have been able to compile your code.

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"...The system cannot find the file specified."

You try running your program (with the Run button, ) and you get "Unable to create process: [2] The system cannot find the file specified."

You must successfully compile your code before you can run it otherwise you will have no executable to run.

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"...%1 is not a valid Windows NT application"

You try running your program (with the Run button, ) and you get "Unable to create process: [193] %1 is not a valid Windows NT application.

You have probably changed the Command to run from %n.exe to something like assess1.c This will not work as you do not actually run the assess1.c gcc compiles it into an executable called assess1.exe and you need to run that. Either by putting back %n.exe or by running assess1.exe or even just assess1

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"This file does not have a program associated with it..."

You try running your program from the DOS prompt by typing something like assess1.c and you get the error "This file does not have a program associated with it for performing this action. Create an association in My Computer by clicking View and then clicking Options."

you do not actually run the assess1.c gcc compiles it into an executable called assess1.exe and you need to run that. So just type assess1

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DOS Window Closes Suddenly

On running your program the DOS window closes before you get a chance to read the output.

The DOS window attached to the run command for PFE is configured to close when your program exits, and your program will exit when it gets to the end of the main function. The best way to get round this is to start up a separate DOS window (with the DOS icon on PFE) and run your code manually, by making sure you are on the Z drive (if you are not type z: and press <RETURN>) and if your code were called assess1.c then you would run it by typing assess1

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You type some input but nothing happens

After running your code and it asks you for some input (if you put something like printf("Enter Values\n"); in your code) you type some input and your program does not seem to respond.

It is quite possible that this is due to problems with scanf. If you put any trailing spaces in the format string of scanf, for example:-

   scanf("%d %d %d ",&f[0],&f[1],&f[2]);
                  ^

The the program will be waiting for that space before the scanf function returns. To fix this simply remove the trailing space.