Help needed urgently. I have been using IDL8.4 on Debian Wheezy for a few years. Recently our lab upgrade Linux system to Debian Jessie, then IDL tells me I don't have license. My license files are still there and I don't believe the version of OS will affect the license. I found it could be the license manager is having problem. All the lm* utilities under the /usr/local/exelis/idl/bin/bin.linux.x86_64 cannot work anymore. Running each of the utilities will get a message: "no such file or directory". Looks like some libraries needed are not available. Can somebody help me solving this problem?