What is "ERROR: Wrong magic number"

[ravi]

Hi all,

I written and compiled a c++ program using g++ no errors or
warning are reported.

But when I run it , reporting an error : ERROR: Wrong magic number.

What is the reason for this error?

anybody had an idea ?

--Ravi.T

 

[ravi]

Hi all,

I written and compiled a c++ program using g++ no errors or
warning are reported.

But when I run it , reporting an error : ERROR: Wrong magic number.

What is the reason for this error?

anybody had an idea ?

--Ravi.T

OS is Linux.gcc3.4.3

 

[Shadowman]

Hi all,

I written and compiled a c++ program using g++ no errors or
warning are reported.

But when I run it , reporting an error : ERROR: Wrong magic number.

What is the reason for this error?

anybody had an idea ?

That sounds like the OS is having a problem running your executable for
some reason -- perhaps the first few bytes of the executable file are
not what they're supposed to be. Could be a problem with the compiler, a
corrupted file, a hardware issue, or something else.

You didn't post any code, but it seems like the problem might be beyond
that.

 

[Andrew Koenig]

I written and compiled a c++ program using g++ no errors or
warning are reported.

But when I run it , reporting an error : ERROR: Wrong magic number.

What is the reason for this error?

Either you didn't link it, or the file you are executing is not the one you
think it is.

 

[James Kanze]

Either you didn't link it, or the file you are executing is
not the one you think it is.

He didn't give a too many details, but in a lot of Unix
distributions today, the default $PATH doesn't have . in it
(which is as it should be for non-developers). And I find a lot
of files have the x bit set when they shouldn't. Combine the
two, and that could very easily explain his symptoms.

Depending on the shell being used, either "type command" or
"which command" can be used to see which executable is actually
being found. More generally, however, when testing a just built
executable, it's usually preferable to invoke it with
../filename. (Or maybe I just believe this because so many of my
test programs are called simply test, and even with . in the
path, test and ./test invoke different things.)