error - in one project is stopping other projects from running

[Sparky]

Greetings -

very new to JAVA and NetBeans -

I have just started a project and it has an error the red underline is on some code that has worked in an earlier example.

I closed that project and opened one that has worked.

I'm now getting the error:

Exception in thread "main" java.lang.RuntimeException: Uncompilable source code
at open_url.Main.main(Main.java:37)

When I try to run other projects including the simple "Hello World"

The error is in the Main - of another project.

When I click one the Main.java:37 link within the error, NetBeans opens the other "Main" file within the project "Open_URL"

How / Why are these projects that have worked now being linked or pointed to this new main with the error in in?

How can I unlink them / tell the project to quit looking at the file?

What info can I provide to help ask this question better?

Thanks
Sparky

[Sparky]

I do notice that the project (Open_URL) is more bold in the left hand list than the other projects (in NetBeans) - the main.java within Open_URL is the place that ALL of my other projects are pointing to for the error. - It appears ALL of my projects will not run (I only have 4 or 5 simple examples). They all point to line 37 of the main.java within Open_URL.

How are these getting linked or connected - how one error in one project stops everybody else?

Thanks
Sparky

[rp181]

Right click the project you are working on, and "set as main project". The build buttons compile the main project, so you are compiling/running something different (the one with the errors).