How to solve this problems ?
Preparing to unpack .../copsfree_1.2.2-1+debug_iphoneos-arm.deb ...
Unpacking copsfree (1.2.2-1+debug) ...
dpkg-deb (subprocess): unable to execute decompressing archive member (xz): No such file or directory
dpkg-deb (subprocess): subprocess decompressing archive member returned error exit status 2
dpkg-deb: error: subprocess <decompress> returned error exit status 2
dpkg: error processing archive /var/mobile/Downloads/copsfree_1.2.2-1+debug_iphoneos-arm.deb (--install):
subprocess dpkg-deb --fsys-tarfile returned error exit status 2
Errors were encountered while processing: