I have recently reinstalled a fresh version of Windows 10. I installed DMD 1.9.0 and compiled my code ( that was compiling before reinstalling Windows ).
I get this error at the linking phase :
Native PDB Error: The entry already exists.  The specified module already exists

I made a simplified project that gets the same error :

import imageformats;
import derelict.glfw3;

void main() {
    IFImage i0;
}

and dub.json :
"dependencies": {
	"derelict-glfw3": "4.0.0-beta.1",
	"imageformats": "~>7.0.0"
}

Compiling for 32-bit works.
Compiling for 64-bit gives that error : dub --arch=x86_64
Changing imageformats version to 5.2.0 compiles but any higher doesn't.
I tried compiling the code with and without admin privileges but it doesn't do anything.
I know that PDB is used for debugging but I don't understand this error.
Any ideas?

On 29/05/2018 7:47 PM, Begah wrote:
> I have recently reinstalled a fresh version of Windows 10. I installed DMD 1.9.0 and compiled my code ( that was compiling before reinstalling Windows ).

What?

That is definitely not a valid dmd version for D2.

On Tuesday, 29 May 2018 at 07:53:49 UTC, rikki cattermole wrote:
> On 29/05/2018 7:47 PM, Begah wrote:
>> I have recently reinstalled a fresh version of Windows 10. I installed DMD 1.9.0 and compiled my code ( that was compiling before reinstalling Windows ).
>
> What?
>
> That is definitely not a valid dmd version for D2.

Sorry, that was the dub version. I ment 2.080.0

On Tuesday, 29 May 2018 at 07:47:07 UTC, Begah wrote:
> I have recently reinstalled a fresh version of Windows 10. I installed DMD 1.9.0 and compiled my code ( that was compiling before reinstalling Windows ).
> I get this error at the linking phase :
> Native PDB Error: The entry already exists.  The specified module already exists
>
> I made a simplified project that gets the same error :
>
> import imageformats;
> import derelict.glfw3;
>
> void main() {
>     IFImage i0;
> }
>
> and dub.json :
> "dependencies": {
> 	"derelict-glfw3": "4.0.0-beta.1",
> 	"imageformats": "~>7.0.0"
> }
>
> Compiling for 32-bit works.
> Compiling for 64-bit gives that error : dub --arch=x86_64
> Changing imageformats version to 5.2.0 compiles but any higher doesn't.
> I tried compiling the code with and without admin privileges but it doesn't do anything.
> I know that PDB is used for debugging but I don't understand this error.
> Any ideas?

for others who come across this (because this is what you find if you google this error):

I haven't found any solution or reason yet, but you can compile in release mode (--build=release for dub) to work around this issue

plain works too

On Tue, Nov 6, 2018 at 7:15 PM WebFreak001 via Digitalmars-d-learn < digitalmars-d-learn@puremagic.com> wrote:

> On Tuesday, 29 May 2018 at 07:47:07 UTC, Begah wrote:
> > I have recently reinstalled a fresh version of Windows 10. I
> > installed DMD 1.9.0 and compiled my code ( that was compiling
> > before reinstalling Windows ).
> > I get this error at the linking phase :
> > Native PDB Error: The entry already exists.  The specified
> > module already exists
> >
> > I made a simplified project that gets the same error :
> >
> > import imageformats;
> > import derelict.glfw3;
> >
> > void main() {
> >     IFImage i0;
> > }
> >
> > and dub.json :
> > "dependencies": {
> >       "derelict-glfw3": "4.0.0-beta.1",
> >       "imageformats": "~>7.0.0"
> > }
> >
> > Compiling for 32-bit works.
> > Compiling for 64-bit gives that error : dub --arch=x86_64
> > Changing imageformats version to 5.2.0 compiles but any higher
> > doesn't.
> > I tried compiling the code with and without admin privileges
> > but it doesn't do anything.
> > I know that PDB is used for debugging but I don't understand
> > this error.
> > Any ideas?
>
> for others who come across this (because this is what you find if
> you google this error):
>
> I haven't found any solution or reason yet, but you can compile in release mode (--build=release for dub) to work around this issue
>

On Tuesday, 29 May 2018 at 07:47:07 UTC, Begah wrote:
> I have recently reinstalled a fresh version of Windows 10. I installed DMD 1.9.0 and compiled my code ( that was compiling before reinstalling Windows ).
> I get this error at the linking phase :
> Native PDB Error: The entry already exists.  The specified module already exists
>
> I made a simplified project that gets the same error :
>
> import imageformats;
> import derelict.glfw3;
>
> void main() {
>     IFImage i0;
> }
>
> and dub.json :
> "dependencies": {
> 	"derelict-glfw3": "4.0.0-beta.1",
> 	"imageformats": "~>7.0.0"
> }
>
> Compiling for 32-bit works.
> Compiling for 64-bit gives that error : dub --arch=x86_64
> Changing imageformats version to 5.2.0 compiles but any higher doesn't.
> I tried compiling the code with and without admin privileges but it doesn't do anything.
> I know that PDB is used for debugging but I don't understand this error.
> Any ideas?

This works fine on my home Win10 machine, dmd 2.082/2.083 + dub 1.11.0, installed using the executable from the downloads page. However I've had this same issue on my work PC for which I'll have to double-check my setup tomorrow.

On Wednesday, 7 November 2018 at 01:37:29 UTC, Chris M. wrote:
> On Tuesday, 29 May 2018 at 07:47:07 UTC, Begah wrote:
>> [...]
>
> This works fine on my home Win10 machine, dmd 2.082/2.083 + dub 1.11.0, installed using the executable from the downloads page. However I've had this same issue on my work PC for which I'll have to double-check my setup tomorrow.

Reproduced the issue on my work machine with dmd 2.082, dub 1.9.0/1.11.0, so it seems to be a dmd issue. The only difference is that my work machine is using mingw libraries rather than Microsoft build tools.

On Wednesday, 7 November 2018 at 14:43:07 UTC, Chris M. wrote:
> On Wednesday, 7 November 2018 at 01:37:29 UTC, Chris M. wrote:
>> On Tuesday, 29 May 2018 at 07:47:07 UTC, Begah wrote:
>>> [...]
>>
>> This works fine on my home Win10 machine, dmd 2.082/2.083 + dub 1.11.0, installed using the executable from the downloads page. However I've had this same issue on my work PC for which I'll have to double-check my setup tomorrow.
>
> Reproduced the issue on my work machine with dmd 2.082, dub 1.9.0/1.11.0, so it seems to be a dmd issue. The only difference is that my work machine is using mingw libraries rather than Microsoft build tools.

Bump. Encountering the same issue. Just reinstalled Windows and having the same error on
DMD32 D Compiler v2.083.1 .

On Saturday, 15 December 2018 at 20:54:03 UTC, JN wrote:
>
> Bump. Encountering the same issue. Just reinstalled Windows and having the same error on
> DMD32 D Compiler v2.083.1 .

OK, fixed it. Since it's the first hit from Google, here's a solution:

https://www.reddit.com/r/roguelikedev/comments/8s5x5n/roguelikedev_does_the_complete_roguelike_tutorial/e11p66q/

"What I did to fix it was install Visual Studio 2017 Community, then go into the VS installer and add both the "Desktop Development With C++" and "Game Development With C++" workloads. It is not enough to just install Visual Studio, and the C++ Build Tools do not have the sufficient .lib files to build the game."

The Game development pack is probably unnecessary, since it's DirectX and stuff, but I installed it just to be safe.