I am new to the SO community and to programming and I wanted to know if someone with more experience can help me.
The problem is this:
I start the pc and execute eclipse in a normal way, double click, select the workspace and enter again. When loading the projects I see that everyone has the red cross that indicates that there is something that DOES NOT work well.
First I thought it was a bug in the code but it is strange in itself, since the last day I used Eclipse worked without problems. I review each class of each project and I can not find any fault, except in a couple of JPA projects, since we are learning JPA and the maps have not yet mastered them.
I've been searching the web to see if I found the problem but the only thing I found was references to the eclipse configuration, since the failure is not shown through the console, but it is a message from the application.
I leave photos for your better understanding. Many thanks in advance to anyone who can help me or at least try.
Thanks again.
Eclipse start image: 
