Dear Hajar Nematollahi

These links seems to be useful, have a look:

1. https://social.msdn.microsoft.com/Forums/vstudio/en-US/7237253f-c345-4721-97d0-d66d7f3c760a/error-while-compiling-fortran-code-in-visual-studio-and-intel-fortran-compiler?forum=visualstudiogeneral

2. https://stackoverflow.com/questions/7818560/getting-error-on-building-a-fortran-program

3. https://community.intel.com/t5/Intel-Fortran-Compiler/quot-Unable-to-Start-Program-quot-Error/td-p/867392

4. https://discussions.apple.com/thread/252534839

Kind Regards

Qamar Ul Islam

Hi, you may have a look to this manual for example or to a more detailed description of the routine that returns an error. Best

When you want an advance search for online forums that have as well elections on Fortran. Stackoverflow would be one of those. There are coders willing to help others with any language and coding problem.

Division by zero is the most common mistake in this kind of situation.

Check this error by printing the concerned variables in the intermediate calculations during execution.