module cannot be declared more than once

[Altera_Forum]

After generating the .qsys file when I am trying to run the top module verilog file in quartus II it is giving error :Error (10228): Verilog HDL error at gmmpipe.v(6): module "gmmpipe" cannot be declared more than once. I gave gmm_accelerator.v and gmmpipe.v module during qsys generation .In includes the gmmpipe.v module. I am attaching both the module. How to fix this error? Please help.

[Altera_Forum]

check those 

 - QuartusII refer to current directory, library( settings ), Files( settings). - module "gmmpipe" does not mean filename, if two of your files have same name ( or two in one file ) this error is occurred.  how are those?

[Altera_Forum]

gmm_accelerator.v includes gmmpipe.v in this way- 

 `ifndef GMM_PIPES  `include "gmmpipe.v" `endif  what does it mean?

[Altera_Forum]

In gmmpipe.v file there are two different modules named gmmpipe1 and gmmpipe2 .But as I know the module name should be same as the file name. 

So I divided this file into two files of gmmpipe1.v and gmmpipe2.v and included them in gmm_accelerator.v . But still it is giving the same error.How can I fix?

[Altera_Forum]

are you sure gmmpipe module isnt also declared in another .v file somewhere?

[Altera_Forum]

I answer the question 3 post before. 

 the 'if' statement means that if GMM_PIPES is "not" defined, your compiler include gmmpipe.v. once gmmpipe.v is included, this file will not be included anymore, because GMM_PIPES is defined in gmmpipe.v  and you say that you didn't find gmmpipe module inside of gmmpipe.v. did you check other files? if you have *.v files on same directory of project-itself, whole files are read by QuartusII.

[Altera_Forum]

Yes,I checked all the files on the same directory of project itself. gmmpipe is not declared in another .v file.

[Altera_Forum]

if you can upload whole project in zip. 

I may be able to check the error.

[Altera_Forum]

Hi, 

 Whenever you generate QSYS system, all verilog source files are copied into folder/submodules where folder will have same name as of your QSYS system in your project. So there will be one copy of your file in that submodules folder.  If you have your original file also added in your project, then you may see this error.  One thing you can do is Double click on that error and see to which file it points. In this way, you may be able to find it out.  Hope this helps.  Cheers, Bhaumik

[Altera_Forum]

Hi Bhaumik, 

 No, I didn't add the original file in my project in quartus II. I added only qsys_system.qip file in my project.

[Altera_Forum]

Hi Akira, 

I am attaching the zip file.

[Altera_Forum]

Your file is being included twice. Once by your include statement, and other time because it is mentioned in the list of files in the project. Remove the file from the project and it should work.

[Altera_Forum]

I agree with Galfonz 

 I have checked verilog files. I did not find multiple declaration of gmmpipe twice.  follow Galfonz's instruction.