Nios II IDE v10 generates an SWT handler error message when choosing C/C++ Build from the project properties screen. I use native Windows 7 installation. Can you tell me what I can do to resolve it?

eclipse.buildId=M20060629-1905
java.version=1.6.0_14
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=sv_SE
Command-line arguments:  -os win32 -ws win32 -arch x86

!ENTRY org.eclipse.ui 4 4 2013-10-09 08:52:25.758
!MESSAGE Unhandled event loop exception

!ENTRY org.eclipse.ui 4 0 2013-10-09 08:52:25.758
!MESSAGE No more handles
!STACK 0
org.eclipse.swt.SWTError: No more handles
    at org.eclipse.swt.SWT.error(SWT.java:3400)
    at org.eclipse.swt.SWT.error(SWT.java:3297)
    at org.eclipse.swt.SWT.error(SWT.java:3268)
    at org.eclipse.swt.widgets.Widget.error(Widget.java:435)

None