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AR# 32786

11.1 ISE - Project Navigator uses excess memory on schematic design files - "ERROR:Portability:3 - This Xilinx application has run out of memory..."


In ISE 11.1, opening, saving, and compiling schematic source files take a more time and memory than expected.

With large schematics the computer might run out of available memory and issue the following error:

"ERROR:Portability:3 - This Xilinx application has run out of memory or has encountered a memory conflict. Current memory usage is 2083006 kb. You can try increasing your system's physical or virtual memory."


In ISE 11.1 schematic files are written to a new XML-based format. The new format will be used when creating a new schematic file or when saving an existing schematic. An issue has been found in the schematic reader code where CR-LF characters are being handled in an inefficient way.

A patch for this issue is available at:


The patch is applicable to ISE 11.1 on Windows 32-bit, Windows 64-bit, Linux 32-bit, and Linux 64-bit platforms.


This Tactical Update is compatible with ISE 11.1 and will no longer be needed as of ISE 11.2.


Please extract to the root of your ISE 11.1 installation directory (for example, C:\Xilinx\11.1\ISE).

The "AR32786_ProjNav_11.zip" file contains four files (one for each supported OS):





Original files in the respective directories should be moved or renamed before you copy the archived files to these locations.

NOTE: Only the file for the operating system being used is required.
AR# 32786
Date 02/25/2011
Status Archive
Type General Article