If LM_LICENSE_FILE is set at the environment level, it overrides the default locations where the license manager looks for runtime licenses. Other software on your machine (the MIPSPro C compiler and ProDev Workshop Pro, for example) use the same license manager; therefore, setting LM_LICENSE_FILE prevents this software from finding its license.
To avoid this, remove LM_LICENSE_FILE from the Studio Installer generated scripts, SYBASE.sh and SYBASE.csh. Instead, set LM_LICENSE_FILE in your start-up script.
For more information see the FLEXlm End User Manual in the online insight documentation.