I don't think you can do it with that procedure, but since you are writing an ENVI format image, you could just use ENVI_WRITE_ENVI_FILE with the NO_OPEN keyword. Or, write the data to a file with WRITEU and set up a header with ENVI_SETUP_HEAD. If you use ENVI_SETUP_HEAD, do not set the OPEN keyword. Jeff

If you are not running in true batch mode (IDL- only and using ENVI_BATCH_INIT), then when data are returned from an ENVI routine, they will automatically be placed in the Available Bands List and this widget will be realized. If you do not want data returned to the ABL, then you should instead run your code in true batch mode rather than hybrid batch (with the ENVI menu initialized). As an alternative, in your code, after you create your new file with ENVI_OUTPUT_TO_EXTERNAL_FORMAT, you can do an ENVI_FILE_MNG and remove it.