I previously had the 6.4.0 SDP working but had to re-install ...

The cksum and md5 are correct for my bin file (qnxsdp-6.4.0-200810211530-linux.bin).
I have run the cleanup in between attempts to install and have tried (export LIBXCB_ALLOW_SLOPPY_LOCK=1) but to no avail
 I get the following messages and the install fails.

libxcb: WARNING! Program tries to unlock a connection without having acquired
        a lock first, which indicates a programming error.
        There will be no further warnings about this issue.
libxcb: WARNING! Program tries to lock an already locked connection,
        which indicates a programming error.
        There will be no further warnings about this issue.

Any help would be appreciated.

Thanks