I've encountered a problem with the native read_jpeg routine after switching from IDL version 7.0 to 8.2. It appears IDL grabs the old DLM and DLL files which crashes IDL for the modules that have been updated like idl_jpeg.dll. Now that I think I've pinned the issue, I can't seem to update the DLM path to fix the problem. . . IDL> print, !DLM_PATH C:\Program Files\ITT\IDL70\bin\bin.x86 IDL> PREF_SET, 'IDL_DLM_PATH', 'IDL_DLM_PATH=C:\Program Files\Exelis\IDL82\bin\bin.x86', /COMMIT IDL> setenv, 'IDL_DLM_PATH=C:\Program Files\Exelis\IDL82\bin\bin.x86' IDL> print, !DLM_PATH C:\Program Files\ITT\IDL70\bin\bin.x86 Restarting IDL after these commands also doesn't take. However the expand path function always shows the correct path. IDL> PRINT, EXPAND_PATH('', /DLM) C:\Program Files\Exelis\IDL82\bin\bin.x86 Any suggestions are much appreciated. Many thanks, Carl (short time lurker, 1st time poster)