in "/usr/lib/python2.6/site-packages/mic/imager/baseimager.py" line 708 I added
fs.makedirs(self._instroot + "var/cache/yum")
args = ["/bin/ls","-ld",self._instroot + "var/cache/yum"]
print os.execl("/bin/ls",*args)


MerSDK /parentroot/media/SDA-85G/sl/mer/imx/01-simple/$ sudo mic create fs base-qmlviewer-gfx_tests.ks -o . --pkgmgr=zypp --compress-disk-image=tar.bz2 --arch armv7hl
Info: Retrieving repo metadata:
Info: Retrieving 1b8e4a661890c36d054217897b6030289606b5be053ab5cd956dd6bf23b633eb-group.xml.gz ...
Warning: can't get http://releases.merproject.org/releases/0.20120209.1/builds/armv7hl/packages/repodata/repomd.xml.key
 DONE
drwxr-xr-x 2 root root 4096 Mar  9 17:56 /var/tmp/mic/imgcreate-fbkzYR/install_rootvar/cache/yum
MerSDK /parentroot/media/SDA-85G/sl/mer/imx/01-simple/$ sudo mic create fs base-qmlviewer-gfx_tests.ks -o . --pkgmgr=zypp --compress-disk-image=tar.bz2 --arch armv7hl
Info: Retrieving repo metadata:
Info: Retrieving 1b8e4a661890c36d054217897b6030289606b5be053ab5cd956dd6bf23b633eb-group.xml.gz ...
Warning: can't get http://releases.merproject.org/releases/0.20120209.1/builds/armv7hl/packages/repodata/repomd.xml.key
 DONE

Error <mount>: Bind-mounting '/var/tmp/mic/cache' to '/var/tmp/mic/imgcreate-1mnDNf/install_root/var/cache/yum' failed
Exception AttributeError: "'NoneType' object has no attribute 'px_proxy_factory_free'" in <bound method ProxyFactory.__del__ of <libproxy.ProxyFactory object at 0x972826c>> ignored
MerSDK /parentroot/media/SDA-85G/sl/mer/imx/01-simple/$