Fixing Nonnegative and Positive Width Errors in Fortran Code Format Strings

[MrElec]

When compiling a fortran code (*.f90) i got these errors:

1- Nonnegative width required in format string.
2- Positive width required in format specifier D.

In Code::Blocks Ide, these errors are referred in the code to :

format( 1000i ) and format ( 1000d ) respectively.

How can i solve this?

 

[jedishrfu]

Here's a reference:

http://www.pcc.qub.ac.uk/tec/courses/f90/stu-notes/F90_notesMIF_9.html

It looks like you want a four digit integer and so specified 1000i when you should have specified i4 which says to reserve 4 positions

and similarly for the 1000d you should have specified d4.2 with 2 decimal places

 

[MrElec]

Thanks, I've tried your solution and WoW these errors disapeared but unfortunately i got this message : D:\Simulations\CM\LAPACK_ARPACK\DOUBLE LAPACK\dsecnd.f|16| Fatal Error: Can't open module file 'dfport.mod' for reading at (1): No such file or directory|. Do you have an idea about this problem

 

[jedishrfu]

THese questions are best answered by searching with Google to see if others have encountered them:

https://stackoverflow.com/questions/35015117/fatal-error-cant-open-module-file-dfport-mod-for-reading-at-1

 

[MrElec]

I've googled this problem before posting it here. In the link you gave, the authors could not give a functional solution. For my case, I'm using gnu fortron as compiler and C::B as an ide.

 

[jedishrfu]

What about this from the link?

One suggestion is to remove the use statements, and see what the compiler/linker complains about being missing

 

[MrElec]

I've tried to remove the use dfport statement, i got other error as etime

 

[Mark44]

See this post: https://wind.nrel.gov/forum/wind/viewtopic.php?t=268
It mentions that DFPORT is a Digital Fortran Portability library that adds Unix and VAX system routines.

 

[MrElec]

Thank you, i think that I've resolved my problem by switching off USE DFORT statement.