In my Kintex-7 design, I receive a "GUI out of memory" message when I click Report Utilization in implemented design.
However, there is free memory on the machine (over 30GB).
When I run "report_utilization" in the Tcl command line, it works with no issues.
The error only occurs with the "report_utilization" -name option.
This message refers to the JAVA memory allocated to the Vivado IDE.
This is the memory which is running out.
A work-around is to increase the amount of JAVA memory that is being allocated.
Please refer to (Xilinx Answer 51659)