load_acl fails on Juniper QFX series switches

[jathanism]

It results in a CommandTimeout error, but in looking at the debug logs it looks like an unhandled Junoscript error is causing the session to hang and eventually timeout:

2014-02-10 15:30:48+0000 [SSHChannel session (0) on SSHService ssh-connection on TriggerSSHTransport,client] [sw3-abc.eng.example.net] BYTES: '<xnm:error xmlns="http://xml.juniper.net/xnm/1.1/xnm" xmlns:xnm="http://xml.juniper.net/xnm/1.1/xnm">\n'
2014-02-10 15:30:48+0000 [SSHChannel session (0) on SSHService ssh-connection on TriggerSSHTransport,client] [sw3-abc.eng.example.net] BYTES: [REDACTED]
2014-02-10 15:30:48+0000 [SSHChannel session (0) on SSHService ssh-connection on TriggerSSHTransport,client] [sw3-abc.eng.example.net] BYTES: '<message>syntax error</message>\n</xnm:error>\n<load-error-count>1</load-error-count>\n</load-configuration-results>\n'

Need to investigate whether this is actually a syntax error, or a matter of platform differences.