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fortran segmentation fault error Princewick, West Virginia

You seem to have CSS turned off. Results 1 to 3 of 3 Thread: Segmentation fault when I compile with gfortran Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch Finding out-of-bounds array references Most Fortran compilers have an option that will insert code to do bounds checking on all array references during runtime. For gfortran, for example, the command line option -fcheck=bounds.

HECC Home About Resources Services Accounts Support NAS Division Website NASA Website NASA Privacy, Security, Notices Trademark Notices Editor: Michelle Moyer Technical Editor: Sherry Chang Webmaster: John Hardman NASA Official: William The name of an array index is misspelled. What are Imperial officers wearing here? call sub( f(1:900,:,:) ) ... --- end main program --- and the "sub" subroutine is in a separately compiled source file: --- external subroutine "sub" --- subroutine sub( f ) real(8)

One approach to locating the problem is to find the line number in the source program where the exception occurred, and then look for clues there. z = .false. It is provided for general information only and should not be relied upon as complete or accurate. y a.OR.y = true (dbx) assign z = a .or.

Post a note to the User Forum HERE.   Please include the name of your application if it a commonly available code, post a stack trace (if you can get one), compiler A bullet shot into a door vs. If you want a higher level of optimization then you should specify the -debug inline-debug-info but realize that the results need to be looked carefully because they may be misleading. I cannot understand why this happened since the line i added and deleted does nothing in my code at all!

Type the run command, which runs the program in the executable files named when you started dbx. (dbx) run Running: my_program stopped in MAIN at line 3 in file "a1.f" 3 I tried to click on the link for pdf presentation at the bottom of the page, but it seem to be broken. linux fortran share|improve this question edited Dec 10 '13 at 17:21 ChrisF♦ 97.4k17171255 asked Dec 8 '13 at 12:20 Matheus Danella 25129 Please narrow it down a little! All I can find is this one: http://gcc.gnu.org/onlinedocs/gcc-4.0.4/gfortran/index.html#toc_Invoking-GFORTRAN But I'm not really sure where to find the information I need.

gneill, Jul 22, 2011 Jul 22, 2011 #11 ASGtFT gneill said: ↑ Whatever compiler you use should have options to generate bounds checking code for arrays and other accesses. b = .false. The compiler I used is gfortran. One problem with my code (which may or may not have led to the segmentation fault) is that it doesn't seem to be portable.

Tango Icons © Tango Desktop Project. INTEGER :: i, j, k INTEGER, DIMENSION(2):: tedge TYPE (cell), POINTER :: pt1, pt2 found = .FALSE. Since gfortran is a Gnu product, I'd expect gdb to work with it, but a little Googling suggests that combination did not work too well in the past. Exploded Suffixes Risk Management in Single engined piston aircraft flight Security Patch SUPEE-8788 - Possible Problems?

The traceback options only work in rare cases. I started out using gfortran, and today I tried to use NAG (somebody told me that it was easier to debug). I suppose you have successfully compiled small test programs with that compiler? Upon running, I get the following error: Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Compile and debug in case-sensitive mode using -U. I need help with a computing problem Fill out this form to submit your issue to the UITS Support Center. Specifying noarrays initializes only variables that are scalars. For more, see What are program segments, and which segments are different types of variables stored in?

You can also have overflow errors which means that you have performed an operation that returns a value outside of what the computer can represent, such as x=(1e100)**100. Start dbx on the executable named my_program. How do investigators always know the logged flight time of the pilots? In practice, segfaults are almost always due to trying to read or write a non-existent array element, not properly defining a pointer before using it, or (in C programs) accidentally using

For more background information, try the excellent Dr. Sorry, not much more I can suggest at this point except looking for other similar debugging switches to enable. Say your program loads all the input data into an array and you wrote the program assuming that at most you'll have, say, 100 pieces of input data. Portland Group pgf90 -C Add array bounds checking; the same as -Mbounds. -Mchkptr Check for unintended de-referencing of NULL pointers.

They also, by default reduce the level of optimization. A pointer is used before it has been defined. gneill, Jul 22, 2011 Jul 22, 2011 #13 ASGtFT I tried it, but it didn't show any errors. Why does argv include the program name?

S. We ran 32 cases using different levels of optimization and with/without the -g, -debug and -debug inline-debug-info. Sign up for the SourceForge newsletter: I agree to receive quotes, newsletters and other information from sourceforge.net and its partners regarding IT services and products. Segmentation faults are catch-alls, usually indicating Some Major Problem.

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