TeXlipse error while building workspace

We seem to have a strange problem at the moment with TeXlipse. I have just recently setup a project on my machine with folders that contain chapters of a book. I then put everything under source control and earlier today tried to build the same project on another machine. When I first open the project and save it everything builds ok and I have no problems. However once I add a new latex file in the project in that machine I get the following dialog box:

Building workspace has encountered a problem

Errors occured during the build

Errors running builder 'Latex Builder' on project.

If I do the same things on my machine I get no errors. Does anyone have an idea as to why we get the errors above on one machine and not other? Eclipse installation is the same, we have the same version of MikTex 2.9 and the same packages.

The error that comes up is:

Errors running builder 'Latex Builder' on project 'doc_help'.
Resource '/doc_help/tmp/main.aux' already exi开发者_运维知识库sts.
Resource '/doc_help/tmp/main.aux' already exists.

Thanks in advance.

I got similar problems in two cases: once, where the folder for temporary files was shared in SVN, and then Texlipse caused some really nasty things during building (it first copies everything from tmp to src; then after building moves the stuff back). So, make sure, that temporary files are not shared through source control.

For the second issue, I don't know what has caused it. I copied the project in another workspace, where I got similar errors. If instead of copying locally, I did another checkout (after removing the old files entirely), the builder seemed to be working.

Thanks to the answer of zoltan I've resolved my issue. I am posting for who puts his project with texlipse under versioning by dropbox and wants to use it while modifying tex files. Basically I went to project properties and I deleted temp directory name from input field labeled Directory for Latex temporary files:

Now it doesn't give me again errors and builds successfully. Hope my answer is not inappropriate and it can help somebody who want to use Dropbox and not use only local directories.

Maybe this error occured because of "cleaning" your project. Running "Project/Clean" removes the tmp folder. Running "Project / Build Project" doesn't restore that folder. Therefore this error message is thrown. The tmp folder is automatically generated (once) when a new project is created.