Roberto,
Its been a while, but I had the same problem with a number of the link edit steps in the generation jobs. After that occurred, I changed the size field in the link edit steps to be SIZE=(2048K,256K) and resubmitted the job at the failing step. I was running the SYSGENxx jobs in a 3072K partition. I didn't have any trouble with them after that. But there was a number of steps where the size has to be changed.
The SIZE that I specified was no doubt way larger than it needs to be, but I just wanted them to execute and not cause future trouble.
Regards,
Bob