Fortran Syntax Errors in CRTM_Module.f90: Troubleshooting Guide

The file 'CRTM_Module.f90' contains multiple syntax errors that are preventing successful compilation. These errors include:

• Line 1: 'error #5082: Syntax error, found '/' when expecting one of: ; BLOCK PROGRAM BLOCKDATA MODULE INTEGER REAL COMPLEX ...'. This indicates a syntax error where a '/' character is found in a place where the compiler expects a different kind of statement.

• Lines 16, 18, 26, 27: 'error #5145: Invalid blank/tab'. This means there are blank or tab characters used in a way that is not allowed by the Fortran syntax. Fortran is very strict about whitespace, and these characters need to be placed appropriately.

• Line 25: 'error #5143: Missing mandatory separating blank'. This signifies that a blank space is required between elements in the code but is missing.

• Line 1: 'catastrophic error: Could not recover from previous syntax error'. The compiler encountered so many errors that it was unable to continue compilation.

How to Fix These Errors:

1. Examine each error location: Carefully review the code around the lines indicated in the error messages.
2. Look for incorrect characters: Check for instances of '/' where they shouldn't be. This might be due to a typo or a misunderstanding of the Fortran syntax.
3. Pay attention to whitespace: Ensure that blanks and tabs are used correctly. Refer to the Fortran language specification for precise rules about whitespace usage.
4. Check for missing separating blanks: Make sure there is a space between code elements where required.
5. Start with the most basic errors: Sometimes, fixing simpler errors will resolve more complex ones. It's often a good idea to work your way through the errors in order, starting with the easiest to correct.

By carefully examining the code and applying these steps, you should be able to resolve the syntax errors and successfully compile the 'CRTM_Module.f90' file.