import std.stdio;

int main()
{
    auto big = File("bigfile", "r+"); //bigfile size 20 GB
    writeln(big.size);  // ERROR!
    return 0;
}

//////////////////////////////////////
std.exception.ErrnoException@std\stdio.d(1029): Could not seek in file `bigfile` (Invalid argument)

I can not work with a large file?
32 bit executable.

On Thursday, 11 May 2017 at 07:24:00 UTC, AntonSotov wrote:
> import std.stdio;
>
> int main()
> {
>     auto big = File("bigfile", "r+"); //bigfile size 20 GB
>     writeln(big.size);  // ERROR!
>     return 0;
> }
>
> //////////////////////////////////////
> std.exception.ErrnoException@std\stdio.d(1029): Could not seek in file `bigfile` (Invalid argument)
>
> I can not work with a large file?
> 32 bit executable.

it seems you cannot :)
files bigger then 4G are still problematic on many platforms.

On Thursday, 11 May 2017 at 07:24:00 UTC, AntonSotov wrote:
> import std.stdio;
>
> int main()
> {
>     auto big = File("bigfile", "r+"); //bigfile size 20 GB
>     writeln(big.size);  // ERROR!
>     return 0;
> }
>
> //////////////////////////////////////
> std.exception.ErrnoException@std\stdio.d(1029): Could not seek in file `bigfile` (Invalid argument)
>
> I can not work with a large file?
> 32 bit executable.

Are you in windows perchance? IIRC the when compiling for 32 bit it doesn't use the 64 bit C file function so that will not work.

On Thursday, 11 May 2017 at 08:42:26 UTC, Nicholas Wilson wrote:

> Are you in windows perchance? IIRC the when compiling for 32 bit it doesn't use the 64 bit C file function so that will not work.

Yes, windows.  Ok, I understood you.