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AR# 24534

9.1i CORE Generator - Generating an IP core on Linux64 results in "An unexpected error has been detected by HotSpot Virtual Machine"


Keywords: JAVA, JVM, jre, HotSpot, Virtual, Machine, Xeon, Intel

Generating an IP core or opening the IP core customization GUI on Linux64 results in the following error message:

"An unexpected error has been detected by HotSpot Virtual Machine:
SIGILL (0x4) at pc=0x0000002a95e9b665, pid=26303, tid=32771
Java VM: Java HotSpot(TM) 64-Bit Server VM (1.5.0-b64 interpreted mode)
Problematic frame:
[thread 49156 also had an error]
65541 also had an error]
An error report file with more information is saved as [thread 65541 also had an error]
If you would like to submit a bug report, please visit:
ERROR:coreutil - An error occurred while running Java. Please examine the console or coregen log file for a specific IP related error.
If there is no specific error the problem may be due to memory limitations.
For more information please consult (Xilinx Answer 21955).


JRE version 1.5.0_1 (which is shipped with the ISE 8 and ISE 9 design tools) does not run properly on Intel Xeon 64-bit processor systems.

To work around this problem, perform the following:
1. Download the latest JRE from:

2. CORE Generator looks for the JRE under $XILINX/java/lin64/jre.
a. Install the downloaded JRE to $XILINX/java/lin64/jre, or
b. Create a new directory and create a MYXILINX variable pointing to the directory (e.g., "setenv MYXILINX /home/user1/my_xilinx"). Install the JRE to the $MYXILINX/java/lin64/jre directory.

Any 1.5 version of JAVA after v1.5.0_10 will resolve this issue.

The JAVA version installed with ISE 9.2i has been updated to JAVA version 1.5.0_11.
AR# 24534
Date Created 09/04/2007
Last Updated 04/08/2009
Status Archive
Type General Article